Polygonal Numbers


In this section we shall study a class of mathematical object known to the ancient Greeks as ‘polygonal numbers.’ They are a generalisation of geometrically-based numbers, such as the numbers of corners of polygons, their yod populations, etc. Remarkable relationships exhibiting beautiful, mathematical harmonies will be shown to exist between polygonal numbers and parameters of the Tree of Life, including those that are group-theoretical numbers of superstring/bosonic string theories. These links turn out to be too closely attuned to Pythagorean mathematical notions to be plausibly explained away as coincidental.

It is important to realize that mathematics during the time of the Pythagorean School in Croton in southern Italy had not yet been formalized into a subject for academic research. Instead, students were taught mathematics in this fraternity in order to contemplate the divine immanent in nature. The mathematical doctrines of Pythagoras cannot be properly understood without recognising that the modern dichotomy of science and religion did not exist then. Pythagoreans believed that man could realise his divine nature by knowing the universal principle that governs the cosmos (a word coined by Pythagoras himself, meaning “world-order,” a world ordered in a state of mathematical harmony). This principle is Number, which is “the principle, the source and the root of all things.” For the Pythagoreans, the spiritual and scientific dimensions of number were complementary and could not be separated. Numbers were not merely measures of things but possessed a spiritual dimension. They believed that understanding the relationship between these two aspects could lead the student to God.

Pythagoras was not only the first to call himself a philosopher but also a priest-initiate of a mystery religion influenced heavily by Orphism, which taught that the essence of the gods is defined by number. Numbers, indeed, expressed the essence of all created things. According to the Pythagorean Philolaus: “All things which can be known have numbers, for it is not possible that without number anything can either be conceived or known.” The Pythagoreans were the first to assert that natural phenomena conformed to mathematical principles and so could be understood by means of mathematics. In this sense, they may be considered the first physicists. However, their doctrine gradually became distorted into the proposition that not only does number express the essence of things but also that, ultimately, all things are numbers. Unconvinced by the peculiar emphasis Pythagoreans gave to numbers because he was not privy to the secrets of their teachings, Aristotle said of them: “These thinkers seem to consider that number is the principle both as matter for things and as constituting their attributes and permanent state.”

The Pythagoreans thought that numbers had metaphysical characters, which expressed the nature of the gods. The number one (the Monad) represented the principle of unity — the undifferentiated source of all created things. The One was equated with the god Apollo (a = not; pollon = of many). Pythagoras became associated with Apollo because he was named after Pythios, the name of Apollo at Delphi, the most sacred place of his oracle. The Pythagoreans did not even regard the number 1 as a number because for them it was the ultimate principle underlying all numbers. The number 2 (Dyad) represented duality — the beginning of multiplicity, but not yet the possibility of logos, the principle relating one thing to another. The number 3 (Triad) was called “harmony” because it created a relation or harmonia (“joining together”) between the polar extremes of the undifferentiated Monad and the unlimited differentiation of Dyad. These properties correspond in the Tree of Life to the meaning of Kether, Chokmah and Binah. The number 4 corresponds to Daath (“knowledge”) because impersonal, objective knowledge proceeds from principles only by standing outside the duality of subject and object, thereby transcending their relativity.

Polygonal Numbers
Pythagoras was the first to use geometrical diagrams as models of cosmic wholeness and the celestial order. Numbers themselves were represented by geometrical shapes: triangles, squares, pentagons, etc., and we have seen that tetractys-divided, regular polygons, the pentagram and the Star of David provide natural representations of Godname numbers or parameters of the Tree of Life, CTOL, and superstring theory. Any positive integer NPolygonal number can be represented by the corners of a regular, N-sided polygon. The ancient Greek mathematicians, however, generalised such ‘figurative numbers’ by considering nests of n regular polygons nested inside one another so that they share two adjacent sides. Dots denoting the number 1 are spaced at regular intervals along the edges of the polygons, the edge of each polygon having one more dot than the edge of its smaller predecessor. The total number PNn of dots in a set of n nested regular polygons with N sides is called a “polygonal number.” The number 1 is the first polygonal number, i.e., PN1 = 1. The second polygonal number, which is simply the number of corners of an N-sided, regular polygon is PN2 = N, the third is PN3, etc. The diagram below shows the first three pentagonal numbers: P51 = 1, P52 = 5 and P53 = 12. Notice that the second pentagonal number is depicted with two dots along each edge of the outermost pentagon and that the third has three dots. In general, the representation of the nth polygonal number PNn has n dots along each of the N sides of the outermost, regular polygon.

First three pentagonal numbers

It can be shown** that:

PNn = ½n[(N–2)n – (N–4)].

Table 1 list for future reference formulae expressing the first ten types of polygonal numbers:


Table 1

N PNn = ½n[(N-2)n − (N-4)]


P3n ≡ Tn = ½n(n+1)


P4n ≡ Sn = ½n(2n-0)


P5n ≡ Pn = ½n(3n-1)


P6n ≡ Hn = ½n(4n-2)


P7n ≡ hn = ½n(5n-3)


P8n ≡ On = ½n(6n-4)


P9n ≡ Nn = ½n(7n-5)


P10n ≡ Dn = ½n(8n-6)


P11n ≡ En = ½n(9n-7)


P12n ≡ dn = ½n(10n-8)


Table 2 lists the values of PNn for 3≤N≤12 and 1≤n≤13:

Table 2. Values of PNn.

















sn− bn

n− cn

















2 3 4 5 6 7 8 9 10 11 12 75 85 48  55 27 30





















































































 8 36 64 92 120 148 176 204 232 260 288 1620 4980 1008 3108 612 1872
 9 45 81 117 153 189 225 261 297 333 369 2070 7050 1287 4395 783 2655
 10 55 100 145 190 235 280 325 370 415 460 2575 9625 1600 5995 975 3630
 11 66 121 176 231 286 341 396 451 506 561 3135 12760 1947 7942 1188 4818
 12 78 144 210 276 342 408  474 540 606 672 3750 16510 2328 10270 1422 6240
 13 91 169 247 325 403 481 559 637 715 793 4420 20930 2743 13013 1677 7917

Also listed are:

a) the sums sn of the first ten types of polygonal numbers for given n:

sn Σ PNn = 5n(11n−7)/2;

b) the running sums of sn:


Σn  Σ  sr = 5n(n+1)(11n−5)/6;

c) the sums bn of the seven polygonal numbers for given n corresponding to the seven types of regular polygons making up the inner form of the Tree of Life, namely, the triangle (N=3), square (N=4), pentagon (N=5), hexagon (N=6), octagon (N=8), decagon (N=10) & dodecagon (N=12):

bn ≡ Tn + Sn + Pn + Hn + On + Dn + dn = n(17n−10);

d) the running sums of bn:


cn  Σ  br = n(n+1)(34n−13)/6;

The difference:

sn − bn = hn + Nn + En = ½n(21n−15),

which is the sum of the polygonal numbers corresponding to the 7-, 9- and 11-sided regular polygons not defined by the geometry of the Tree of Life (notice the appearance here of the Godname numbers of Kether (21) and Chokmah (15));

f) the running sums of (sn − bn):

  Σn  − cn =  Σ  (sr−br) = n(n+1)(7n−4)/2.

The best-known polygonal number is the Pythagorean Triangle, or tetractys: 

Tetractys as 4th triangular number

As the fourth triangular number T4 = 10, it is an equilateral, triangular array of ten dots that denotes the Decad, which for the Pythagoreans was the perfect number, symbolising wholeness and unity. The importance of the tetractys to them is illustrated by their oath of fellowship:
“I swear by the discoverer* of the Tetractys,
Which is the spring of all our wisdom,
The perennial fount and root of Nature.”
It came to signify for the Pythagoreans an all-embracing paradigm for whole systems. They believed that a four-fold pattern permeated the natural world, examples of which are the four seasons, the point, line, surface and solid and the four elements Earth, Water, Air and Fire. However, this alone does not explain why they valued the tetractys so much. Its true significance is that it turns objects with sacred geometry into numbers having cosmic meaning, some of which are relevant to theoretical physics. The Pythagoreans called the Tetrad, or number 4, “the greatest miracle.” For this, indeed, is what it is, because it both prescribes and expresses the mathematical description of all levels of reality, including the subatomic world. 

The author has called the mathematical counterpart of the Pythagorean metaphysical doctrine of the Tetrad the “Tetrad Principle.” This states:



An integer of significance to the physics of fundamental processes is always either:

1) the 4th member of a class of numbers (sometimes the (42=16)th member of a class). If the first member of this class is 1, it may be the 4th member after 1;
2) the sum of the first 4 members of a class of numbers;
3) the sum of 4 consecutive members of a class, starting with the 4th;
4) a property of either the 4th member or the first 4 members of a class of mathematical objects, or of the square (symbol of the Tetrad) or square matrix array of integers or mathematical objects, or of a tetractys array or geometrical pattern of integers with orthogonal symmetry.

It is discussed in more detail in Article 1. The most obvious example from superstring theory of this principle is its prediction that space-time has 10 dimensions, where 10 is the fourth triangular number: 

10 = 1 + 2 + 3 + 4.

Another example from bosonic string theory is its prediction that there are 16 higher dimensions beyond 10-dimensional space-time, where 16 = 42. Many more will be encountered later and throughout this website. No claim is made for the converse of this principle, e.g., the fourth (or 16th) member or the first four members of any class of mathematical objects always quantify a parameter governing fundamental processes. The Tetrad Principle is a necessary, but not sufficient, condition for a number to be of significance to the subatomic world. This means that a number which is predicted by a theory as having fundamental significance in the subatomic world and which is consistent with the Tetrad Principle is not necessarily an actual parameter of the physics of this world. The fact that examples to be discussed shortly can be found which show how this principle prescribes parameters of the theories of superstrings and bosonic strings does not indicate in itself that these theories are true. Taken individually, such examples merely demonstrate that they satisfy a necessary criterion for being valid. What, however, turns this criterion into a potent principle is the large degree to which these two theories support it. As the subsection entitled "Godname numbers" reveals, their degree of consistency with the Tetrad Principle so exceeds what chance would lead one to expect that such detailed conformity cannot, plausibly, be dismissed as coincidence. Instead, it is indicative of a powerful principle at work hitherto unrecognised by science that prescribes the mathematics of fundamental phenomena. The Pythagoreans appear to have sensed it by their emphasis on the importance of the number 4 to the study of nature. However, their preoccupation with the Tetrad/tetractys was not taken seriously by scholars because the latter understood it only in a secular sense that encompassed too wide a range of seemingly unrelated phenomena to make the principle plausible.

1st 4 orders of tetractyses

The tetractys is but one member of an infinite series of tetractyses in which the nth member Tn is generated by replacing each yod in the (n−1)th member by a tetractys, two adjacent yods being substituted by two tetractyses sharing a corner. The Pythagorean Monad — the geometrical point — is the first member T0 of this series (the 0th-order tetractys), the Pythagorean Triangle (1st-order tetractys) is the second member T1, the 2nd-order tetractys T2 is the third, and so on. The Tetrad Principle prescribes properties of higher order tetractyses as well as T1 because they, too, are representations of spiritually whole systems, albeit more differentiated ones. Because of its importance to our discussion, we illustrate below how the Tetrad Principle prescribes properties of T2:

1)     number of yods = 85 = 40 + 41 + 42 + 43;

2)     number of yods surrounding its centre = 84 = 12 + 32 + 52 + 72;

3)     number of corners (○) of 1st-order tetractyses = 15 = 4th Mersenne number = 4th triangular number after 1;

4)     number of sides of 1st-order tetractyses = 30 = 12 + 22 + 32 + 42;

5)     number of hexagonal yods (•) = 70 = 10×7 = (1+2+3+4)×4th odd integer.

The polygonal numbers in Table 2 will now be examined in the context of the Tree of Life and CTOL, the Godname numbers and superstring group-theoretical numbers.

Tree of Life

1) The fourth triangular number is 10 (=1+2+3+4). This is the number of Sephirothic corners of its 16 triangles, where 16 is the fourth square number:

16 as square number

The fourth pentagonal number:

22 as 4th pentagonal number

is the number of Paths in the Tree of Life forming the sides of its triangles. This is an example of how the Pythagorean Tetrad defines structural parameters of the Tree of Life. As shown here, the Tree of Life has 70 yods when constructed from tetractyses, where 70 = 7×10, 7 is the fourth odd integer and 10 (=1+2+3+4) is the fourth triangular number. The 1-tree has 80 yods, where 80 = 8×10 and 8 is the fourth even integer. Constructed from Type A triangles, it has 171 more yods, where 171 = 19×9, 19 is the tenth odd integer and 9 is the fourth odd integer after 1. The number of yods other than SLs = 240



    4! 4!     




  4! 4!  4!  4!   

where 4! = 1×2×3×4.

2) The number of Paths in four overlapping Trees of Life, which in Kabbalah represent the four Worlds of Atziluth, Beriah, Yetzirah & Assiyah, is 

70 as sum of 4 octagonal numbers

This is also the number of corners of the (7+7) enfolded polygons and the number of yods in the tetractys-divided Tree of Life (see here). A tetrahedral number is the number of points in a stack of triangular numbers, each of which is a triangular array of points. They can be extended into 4-dimensional space, forming 4-dimensional, tetrahedral numbers. 70 is the fourth such number after 1. In fact, the first four of these numbers: 
1,  5, 15,  35, 
are the numbers of yods in, respectively, the sequence: 
point (1) → point+line (1+4=5) → point+line+triangle (1+4+10=15) → point+line+triangle+tetrahedron (1+4+10+20=35) 
that constitutes the "trunk" of the Tree of Life (see here), 70 being the number of yods in the whole Tree when its 16 triangles are turned into tetractyses. 

The arithmetic mean of the first n triangular numbers Tn is

tn = (n+1)(n+2)/6.

Therefore, t10 = 22 and t19 = 70. Assigning the first 10 triangular numbers to the 10 yods of the tetractys and the first 19 triangular numbers to the 19 yods of a Type A triangle (see here), we see that the average of the former is the number of Paths in the Tree of Life and that the average of the latter is the number of Paths in four Trees of Life, as well as the yod population of the Tree of Life.

3) Polygonal numbers possess a counterpart to how 35 and 70 can be expressed in terms of 4-dimensional, tetrahedral numbers:

35 as 4th pentagonal number after 1

that is, 35 is the fourth pentagonal number after 1 and 70 = P7;

4) the number of Trees in CTOL = 91 (see here) 

91 as sum of first 6 squares

 i.e., 91 is the sixth hexagonal number after 1. A Type B hexagon contains 91 yods (see here).

5) The number of SLs in CTOL is

                          P1                              55                            T10
                        P2  P3                     55 55                       T10  T10
550 =           P4  P5  P6        =      55 55 55     =        T10  T10  T10
                  P7  P8  P9  P10        55 55 55 55          T10  T10  T10  T10.

where T10 = 55,

                                                                                                   T2    T3

                                   55 + 55 + 55 + 55            =                T4    T5    T6

                                                                                           T7    T8    T9   T10,


                                                  ●                                                  S1

                                             55   55                                           S2   S3

                                         55   55   55                 =                 S4  S5  S6

                                          55   55                                 S7  S8   S9  S10.


Polygonal number representation of 550

Notice that T4 is the Pythagorean tetractys and that H7 = 91. The Star of David ‘defines' CTOL in terms of the 4th triangular number T4, the 5th square number S5, the 6th pentagonal number P6, etc (notice how the order of the polygonal number increases monotonically by 1 for all six numbers).

6) The number of SLs in the 49-tree representing the cosmic physical plane is

299 as sum of polygonal numbers

The order of each polygonal number is the number of corners of the corresponding polygon. The triangle, square, pentagon, hexagon and octagon are the first five regular polygons enfolded in the Tree of Life. They have 26 corners and contain 161 yods corresponding to the 161 SLs of the 26-tree that is the counterpart of 26-d space-time predicted by the quantum mechanics of spinless strings. We see how the number of YAHWEH defines both space-time and the cosmic physical plane.

7) The number of yods surrounding the centres of the seven separate regular polygons generated by the Tree of Life is 

288 as sum of 8 pentagonal numbers= 11 + 22 + 33 + 44.

Once again, the octagon, whose 49 yods measure the number value of EL ChAI, the Godname of Yesod, represents a structural parameter of the set of polygons.

Godname Numbers

1) The fifth octagonal number, O5 = 65, is the number of ADONAI, the Godname of Malkuth. This is the fourth octagonal number after 1, illustrating how the Tetrad Principle defines this powerful number. 65 is the sum of the first 10 integers after 1:







 65 =




        8 9 10   11 . 

This shows how the number 10, the Decad, determines the Godname number of the tenth Sephirah. Using the identity:


                                                                                                                  Σ Pr = nTn,





  P3 P3        T2 T2  





= 65




P1  P1 P1  P1    T4 T4  T4  T4 .

The sum of the first five nonagonal numbers:

155 as sum of first 5 nonagonal numbers

defines the number of the complete Godname ADONAI MELEKH of Malkuth.

2) The remarkable mathematical properties of the Pythagorean tetractys, Tetrad and Decad are illustrated by the equation

Sum of 1st 4 orders of 10 polygonal numbers

which relates the number of ADONAI and the Godname numbers of the first four Sephiroth to the first four sets of ten polygonal numbers.

3) The inverse of the summation in (2) is

Representation of 1870

where the number at the centre of this 2nd-order tetractys array of integers: 

22 expressed in terms of 1, 2, 3 & 4

is the number of Paths in the Tree of Life. 1870 = 187×10, where 187 is the number value of Auphanim, the Order of Angels assigned to Chokmah. The number 26 of its Godname YAHWEH forms the base of this array.

4) The number of the Godname YAHWEH ELOHIM of Tiphareth is

76 as sum of 1st 4 polygonal numbers of 4th order

that is, it is the sum of the first four polygonal numbers of the fourth order. It illustrates how the Tetrad defines this number. Notice that T4 + S4 = 26, the number of YAHWEH, and that H4 + P4 = 50,  which is the number of ELOHIM. The Tetrad also determines the latter because 50 is the sum of the first four triangular numbers and the first four square numbers:

50 = (T1 + T2 + T3 + T4) + (S1 + S2 + S3 + S4).

5) Compare (4) with

49 expressed in terms of 1st 4 polygonal numbers of 10th order

which relates the tenth triangular, square, pentagonal and hexagonal numbers — the first four types of polygonal numbers — to the number 49 of the Godname EL ChAI of Yesod.

6) The number of SHADDAI EL ChAI, the complete Godname of Yesod, is

363 as sum of octagonal numbers

This summation of the first six octagonal numbers after 1 relates the octagon with 49 yods prescribed by EL ChAI to the sixth Sephirah of Construction.

7) The eighth, non-trivial hexagonal number is H9 = 153, which is the number of the Godname ELOHIM SABAOTH of Hod, the eighth Sephirah, counting from Kether.

8) The seventh, non-trivial heptagonal number is h8 = 148, which is the number of Netzach, the seventh Sephirah, counting from Kether.

9) The sum of the first seven orders of polygonal numbers corresponding to the seven regular polygons of the inner Tree of Life is


Σ  (Tn + Sn + Pn + Hn + On + Dn + dn) = 2100.


This illustrates the potency of the Godname number 21 of Kether. Notice that the number 26 of YAHWEH forms the base of this tetractys array.

10) The sum of the first seven orders of non-trivial polygonal numbers (i.e., numbers larger than 1) corresponding to the seven regular polygons of the inner Tree of Life is


Σ (Tn + Sn + Pn + Hn + On + Dn + dn) = 3108


Representations of 3108

 Tetrad representation of 3108

This demonstrates the beautiful symmetry inherent in these numbers based upon the Pythagorean Tetrad, which defines the number 7 as the fourth odd integer. 3108 is the number of geometrical elements making up the 91 Trees of Life in CTOL (for proof, see here). This parameter of CTOL is prescribed in a very remarkable way by EL ChAI, the Godname of Yesod with number value 49, because 3108 is the sum of (7×7=49) polygonal numbers. The fact that it is also the sum of the fourth powers of the first four odd integers demonstrates par excellence the Tetrad Principle.

11) The sum of the first (10×10) polygonal numbers is

              10     12

Σ10 =  Σ   Σ  PNn = 9625 = 25×385

              n=1   N=3

 Representation of 9625

12) The sum of the first (10×10) array of polygonal numbers other than unity is

11  12

Σ  Σ PNn = 12750 = sum of 15 integers 15, 25, 35, 45… 155 = 10×85×15,

n=2 N=3


2nd-order tetractys representation of 12750

This illustrates the powerful, archetypal nature of the Godname YAH with number 15. The sum of the 10×10 square array of polygonal numbers determined by the Decad is the sum of 15 integers, starting with 15 and spaced ten units apart. Notice that:


     12 13   
 155 =




   17  18 19    20 ,

that is, starting with the next integer after the tenth one, 155 is the sum of the next ten integers having 15 at its centre when arranged as a tetractys. These two properties serve to demonstrate how the Decad determines arithmetically not only the number 65 of ADONAI (as we saw in (1)) but also the number 155 of ADONAI MELEKH, the complete Godname of Malkuth, the tenth Sephirah.

13) The sum of the first (10×5=50) polygonal numbers is

  10     7
 Σ    Σ  PNn = 2750 = 55×50,

 n=1   N=3




 55 =




  7 10 

(the tenth triangular number and the tenth Fibonacci number) is the arithmetic mean of the first 50 polygonal numbers. This illustrates how the parameter 55 of CTOL, which has 550 (=10×55) SLs (see here), is prescribed by the Godname ELOHIM with number value 50. The 55th SL from the bottom of CTOL is the 496th SL from its top, where 496 is the number value of Malkuth and the dimension of both E8×E8 and SO(32), the two gauge symmetry groups describing the unified forces between the two types of heterotic superstring (see under "Superstring gauge symmetry group" here). The number 55, therefore, determines the number at the very heart of superstring theory that was shown by physicists Michael Green and Gary Schwarz to be the dimension of a symmetry group that generates interactions between superstrings that are free of quantum anomalies.

14) The inverse of the summation in (13) is the sum of the (5×10=50) polygonal numbers:

 5      12

Σ     Σ  PNn = 1250 = 25×50

n=1   N=3

Square representation of 1250

 15) The sum of the first (7×7=49) polygonal numbers is 
                                                   7        9
                                                  Σ      Σ  PNn = 1764 = 49×36.
  n=1    N=3 

The number 36 of ELOHA, the Godname of Geburah, is the arithmetic mean of the first 49 polygonal numbers, where 49 is the number value of EL ChAI, the Godname of Yesod.

16) The sum of the Godname numbers of the seven Sephiroth of Construction is


           539 = 31 + 26 + 76 + 129 + 153 + 49 + 65 =   Σ On.



Parameters of Superstring & Bosonic String Physics

(1) The dimension of superstring space-time is

10 = T4,

the number of compactified dimensions of bosonic strings beyond superstring space-time is

16 = S4,

and the total number of compactified dimensions for bosonic strings is

22 = P4.

These numbers demonstrates the Pythagorean principle (referred to here as the "Tetrad Principle") of a 4-fold pattern in these numbers characterizing the nature of matter, for they are the fourth triangular, square & pentagonal numbers.

2) The dimension of the superstring symmetry group E8 is

Representation of 248

where 31 is the number value of EL, the Godname of Chesed, which is the fourth Sephirah from the top of the Tree of Life. This demonstrates how the Pythagorean Tetrad determines the symmetry group E8 at the heart of superstring theory (notice that 248 is the sum of the first eight polygonal numbers of the fourth order). Also, the rank of E8 is 8, which is the fourth even integer. Notice that


Representation of 112

is the number of non-zero roots of E8 of a certain kind. 112 is the number value of Beni Elohim, the Order of Angels assigned to the Sephirah Hod.

3) The total number of non-zero roots of E8 is

Representation of 240 

where T5, S5, etc. are the fourth triangular numbers, square numbers, etc. after 1. Notice that the smallest polygonal number here is T5 = 15, the number of YAH, whilst the largest number is O5 = 65, which is the number of ADONAI, the Godname of Malkuth. Also notice from Table 2 that 
Representation of 650 
240 as sum of polygonal numbers 

i.e., the sum of the first four orders of polygonal numbers corresponding to the three regular polygons (7-, 9- & 11-sided polygons) which are not generated by the Tree of Life is equal to the number of non-zero roots of E8. Once again, the Pythagorean Tetrad is seen to generate a group-theoretical parameter of this superstring symmetry group. The number of ADONAI expresses the sum of the first four orders of the first ten types of polygonal number.

4)  The dimension of the anomaly-free gauge symmetry groups E8×E8 and SO(32) of heterotic superstrings is

496 as 31st triangular number 
In other words, the number 31 of EL ("God"), the Godname of Chesed, prescribes the dimension of this gauge group as the 31st triangular number. The arithmetic mean of the first n pentagonal numbers is

  (1/n)  Σ  Pr = Tn.

Therefore, 496 is the arithmetic mean of the first 31 pentagonal numbers:


496 = (1/31) Σ  Pn,


so that


Σ  Pn = 31×496 = 31×(1+2+3+... + 31).


Since the tetractys-divided pentagon has 31 yods (see here), it has the remarkable property that it generates not only the number 496 when the first 31 integers are assigned to its yods but also the same number when 496 is assigned to each yod as when the first 31 pentagonal numbers are assigned to them! Moreover, this property is unique to the pentagon because assigning the (6n+1)th triangular number T6n+1 to each of the (6n+1) yods of an n-sided regular polygon gives the same sum as assigning the polygonal numbers PNr (r = 1, 2,... 6n+1) only for n = 5. The pentagram has the equally important property that, if the 30 triangular numbers T1, T2, ...T30 are assigned to the (12 + 22 + 32 + 42 = 30) yods along its boundary: 
30 yods on boundary of pentagram 
their sum is 
Representation of 4960 
In superstring theory, each of the 496 roots of the gauge group E8×E8 is associated with a gauge charge that is the source of a vector gauge field having 10 components defined with respect to the 10 dimensions of space-time. Therefore, the pentagram generates the number of space-time components of all the gauge bosons responsible for the forces of nature other than gravity — truly an amazing property of this ancient, religious symbol.

1680 turns in each whorl of the UPA

The 10 whorls of the UPA/subquark superstring make 50 revolutions around its axis of spin. Each helical whorl comprises 1680 circular turns, there being 336 turns in each of its five revolutions. The number 1680 is the 24th octagonal number: O24. Here are the first five octagonal numbers:
The first 5 octagonal numbers
As 336 = (12+22+32+42+...+312) ⁄31, we see that this structural parameter of superstrings is the arithmetic mean of the first 31 square numbers. This shows how EL ("God"), the Godname of Chesed with number value 31, prescribes the form of the UPA.

Using the identity:

Hn = 4Tn-1 + n,

    H16 = 4T15 + 16

    = 480 + 16 = 496,

which compares with the fact that the 496 roots of E8×E8, one of the two anomaly-free, gauge symmetry groups of superstrings, consist of 480 non-zero roots and 16 zero roots. H16 is the 15th hexagonal number after the trivial hexagonal number: H1 = 1. This shows how the number 15 of the Godname YAH of Chokmah determines the dimension 496 of the two symmetry groups at the heart of superstring theory.

5) The 26th triangular number is the sum of the sixth polygonal numbers of the first six types:

Representation of 351 
(notice the double role of the number 6). This number is the number of corners of the 70 polygons enfolded in the inner form of 10 overlapping Trees of Life that represent 10-dimensional, superstring space-time (see here). 

6) The sum of the tenth polygonal numbers of the first seven types is

Representation of 1330 ,

where 133 is the dimension of E7, the rank-7 subgroup of E8. Notice that



    32 52  
1330 =




  132 152 172 192

is the sum of 100 (= 13 + 23 + 33 + 43) odd integers comprising these 10 (=1+2+3+4) square numbers. The sum of the tenth set of the first 10 polygonal numbers is

Representation of 1600 
illustrating the representational power of the Pythagorean Tetrad. 

7) This is the 4th-order tetractys T4:

4th-order tetractys

It has



    240 240  
74 − 1 = 2400 =




  240  240  240  240 

hexagonal yods surrounding its centre that belong to lower-order tetractyses corresponding to Sephiroth of Construction because each hexagonal yod in the 1st-order tetractys gets replaced in the 2nd-order tetractys by a 1st-order tetractys with seven hexagonal yods, and so on, so that the numbers of such yods in higher-order tetractyses increases according to the geometric series 71, 72, 73, 74, etc. The 5th-order tetractys T5 has 16800 hexagonal yods surrounding its central set of seven hexagonal yods. The fourth-order tetractys, T4, therefore expresses through its 2400 hexagonal yods the number of space-time components of the gauge fields corresponding to the 240 non-zero roots of E8, namely, 240×10 = 2400, whilst T5, the fourth higher-order tetractys beyond the ordinary tetractys T1, embodies the number (16800) of coils in the 10 helical whorls of the UPA/subquark superstring paranormally described by C.W. Leadbeater and Annie Besant (see here). In the former case, the Tetrad Principle prescribes a dynamical parameter of superstrings; in the latter, it determines the tetractys representation of their structural parameter.

8) The sum of the first seven orders of the first 10 types of polygonal numbers is 3360:


 ∑ (Tn + Sn + Pn + Hn + hn + On + Nn + Dn + En + dn) = 3360.


This is a primary structural parameter of the subquark superstring that is embodied in sacred geometries (see The holistic pattern) because its 10 whorls make five complete revolutions around its axis of spin, i.e., each of their revolutions on average comprises 16800/5 = 3360 circular turns of their helices. Amazingly, this is the number of yods in the seven enfolded polygons of the inner Tree of Life with 2nd-order tetractyses as their sectors (for proof, see Article 24, ref. 3) :

Polygonal counterpart of the inner Tree of Life

This extraordinary property is illustrated by the 2nd-order tetractys array shown above with polygonal numbers assigned to its 70 hexagonal yods. The seven orders of each type of polygonal number are assigned to the hexagonal yods corresponding to Sephiroth of Construction. Polygonal numbers of the type corresponding to the seven enfolded polygons of the Tree of Life are assigned to the 7×7 hexagonal yods of the seven tetractyses arranged at the corners and centre of a hexagon. The dodecagonal numbers are assigned to the central tetractys because both the dodecagon as the seventh of the regular polygons of the inner Tree of Life and the central yod of a tetractys correspond to Malkuth, the seventh Sephirah of Construction. Polygonal numbers corresponding to the three types of polygon not generated by the Tree of Life (7-, 9- & 11-cornered polygons) are assigned to hexagons in the tetractyses at the corners of the 2nd-order tetractys. The sum of these (3×7=21) numbers is


 (hn + Nn + En) = 1260




    126 126  




  126 126 126 126 ,

1260 is the number of Tarshishim, the Order of Angels assigned to Netzach, the seventh Sephirah. It is remarkable that the number 126 is the sum of the values of the four types of combinations of the letters of EHYEH (Hebrew: אהיה; English: AHIH), the Godname of Kether, whose number value is 21:

A = 1, H = 5, I = 10

 1. A + H + I =   16
 2. AH + HI + AI + HH =   42 
 3. AHI + HIH + AHH =   47 
 4. AHIH =   21


= 126


It is also remarkable that it is the arithmetic mean of the first 26 triangular numbers and therefore prescribed by YAHWEH, the Godname of Chokmah with number value 26:

126 = (1/26) Σ Tn.

The sum of the remaining (7×7=49) polygonal numbers in the hexagonal array of seven hexagons is


 (Tn + Sn + Pn + Hn + On + Dn + dn) = 2100




    210 210  




  210 210 210 210 ,


  210 210 210 210
  210 210  210 210 

3360 =




  210 210 210 210 .

This is an example of the Tetrad Principle expressing a structural parameter of the superstring through the 4×4 square array of the number value of a Godname, in this case, EHYEH.

This polygonal counterpart of the inner Tree of Life demonstrates the beautiful harmony between number and sacred geometry. The number 3360 is the number of circular turns in one revolution of the 10 whorls of the UPA/subquark superstring. The polygonal representation of this structural parameter of the subquark state of a superstring reveals its archetypal character in a remarkable way. How it is embodied in sacred geometries is discussed here [see under heading "3360 = 1680 + 1680 (or 336 = 168 + 168)"]. See also here.

A comment needs to be made concerning the significance of the properties of polygonal numbers demonstrated above. Given a source of 100 numbers listed in Table 2 comprising the first ten orders of the first ten types of polygonal numbers, as well as all their possible combinations, it is obvious that it would not be too hard to pick at random certain combinations of them whose sum is equal to some given number. Indeed, it would have been highly improbable, statistically speaking, if none of these polygonal numbers or their combinations had turned out to be parameters of the Tree of Life and other sacred geometries. Should, therefore, any significance other than coincidence be assigned to these results? The answer is: yes, because there is in fact no randomness displayed in the examples actually discussed. In the case of single polygonal numbers PNn, the order n is usually either 4 or 5 (both being allowed according to the Tetrad Principle) or 10, or a number that corresponds to the order of appearance in the Tree of Life of the Sephirah whose number or Godname number is PNn. In the case of numbers that are sums of polygonal numbers, the number of terms in the sum may be 4, 5, 6, 8 or 10. But the crucial point is that the orders n of the summed numbers are either all the same or increase by equal increments of 1 from term to term in the summation. This is not a random pattern indicative of deliberate cherry-picking of polygonal numbers that add up to some required number. In other cases, the number of polygonal numbers in the sum is a Godname number, 40, 70 or 100, these numbers having obvious Pythagorean character vis-à-vis the Tetrad, 2nd-order tetractys (its number of hexagonal yods) or Decad. These representations of parameters of the Tree of Life or CTOL, Godnames and group-theoretical numbers of string theory are, therefore, not arbitrary, random sets of polygonal numbers of different orders. Instead, they display definite patterns of progression. Admittedly, the choice of these examples was not prompted by any underlying theory. But none was needed, as the purpose of the exercise was to demonstrate that a real, substantive nexus exists between polygonal numbers and the archetypal numbers that are embodied in sacred geometries analyzed in this website — a connection which displays a beautiful harmony between number and sacred geometry engineered by the tetractys, Decad and Tetrad. Examples (9), (12), (13) & (15) in the section entitled "Tree of Life" are spectacular evidence of how Godname numbers are connected to the properties of sets of polygonal numbers either defined by the Decad or corresponding to the seven polygons of the inner form of the Tree of Life, whilst the role played by the Tetrad in expressing the property given in (10) is unmistakable. Example (7) discussed above, in which the Tetrad Principle defines orders of tetractyses embodying both the dynamical parameter 2400 and the structural parameter 16800 of the superstring, is also incontestable. What we have here is not chance at work. Instead, we are glimpsing the transcendental Intelligence that turns number into form, namely, the superstring.
Such examples serve to demonstrate the Pythagorean doctrine that number is the most fundamental principle of all because it expresses the beautiful harmonies underlying the mathematics of the physical and spiritual cosmos. Moreover, they show that the properties of polygonal numbers are intrinsically linked to the tetractys. It was clear to Pythagoras that number is the most important principle of all because of his insight that the harmonies revealed in their relationships must be realized in nature. The tetractys is the basic paradigm of the Divine Creation, encompassing every one of its sensory and supersensory levels, and so it is the natural expression of these relationships. Through the discovery by superstring theory that space-time must have ten dimensions, modern physics has discovered an example of this paradigm. 
The Fibonacci connection
The sum of the first 10 nth-order polygonal numbers ≡ sn = 5n(11n−7)/2 = ½(55n2−35n).
The sum of the seven nth-order polygonal numbers whose shapes conform to the seven regular polygons making up the inner Tree of Life ≡ bn = n(17n−10) = ½(34n2−20n).
The sum of the remaining three nth-order polygonal numbers = sn − bn = ½n(21n−15) = ½(21n215n).
Apart from the common factor of ½, the coefficients of n2 in each sum are 55, 34 & 21, which are the tenth, ninth & eighth Fibonacci numbers after 0 belonging to the famous Fibonacci series:
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, ....
(see Article 50 (Part 1 & Part 2) for how Fibonacci numbers appear in sacred geometries; see Article 51 for how they are connected to the Pythagorean musical scale). Excluding the implausible possible that it is mere chance that the coefficients are consecutive Fibonacci numbers, the question arises: why should the mathematical growth of the polygonal numbers be determined by some of the same numbers that manifest in the phillotaxis of many plants and
21-34 spirals in sunflower
flowers? An example is the sunflower (see above), which, typically, has 34 spirals of florets twisting in one direction and 21 spirals twisting in the other, making a total of 55 spirals. Obviously, the appearance of Fibonacci numbers in these sums of polygonal numbers arises from having chosen particular sets of polygonal numbers, namely, the first 10 of any order, the seven of any order that correspond to the seven types of regular polygons in the inner Tree of Life and the three of any order that correspond to the three regular polygons absent from this archetypal set: the heptagon, nonagon & undecagon. The numbers 55, 34 & 21 therefore arise from the 3:7 division of the number 10, which manifests in the tetractys as its three corners and its seven hexagonal yods and in the Tree of Life as the Supernal Triad and the seven Sephiroth of Construction. The 7-, 9- & 11-cornered polygons are analogous to the former because they are not part of the geometry of the inner form of the Tree of Life — just as the Supernal Triad stands outside objective Creation. The polygonal numbers corresponding to them have sums that are determined by the number 21 of EHYEH, the Godname of Kether, the first member of the Supernal Triad. The 3-, 4-, 5-, 6-, 8-, 10- & 12-cornered regular polygons making up the inner Tree of Life are analogous to the seven Sephiroth of Construction, which have objective manifestation. The polygonal numbers that correspond to them have sums determined by the number 34, the next Fibonacci number after 21. Clearly, to dismiss the two subsets of polygonal numbers as lacking significance on the grounds that there are six other possible pairs of subsets that generate the coefficients 34 and 21 in their sums is to miss the point. What is significant here is that the types of polygonal numbers corresponding to the seven regular polygons in the inner Tree of Life and the types corresponding to the three regular polygons absent from it create three successive Fibonacci numbers. Of the 120 possible combinations of three polygonal numbers drawn from a group of 10, seven combinations generate the coefficient 21 in their sum, creating a chance of 1 in 17 that its appearance is a coincidence. Add to this the non-trivial fact that the first ten polygonal numbers of a given order generate the coefficient 55 in their sum and it is inescapable that the property of certain sums of polygonal numbers displaying Fibonacci numbers is significant, statistically speaking, because it is unlikely that it could be due to coincidence. Indeed, they manifest not only in each order of polygonal number as the sum of 10, sum of seven and sum of three numbers but also in the sums of all the 7n polygonal numbers up to the nth order that correspond to the seven types of regular polygons, for cn = n(n+1)(34n−13)/6 = (n/6)(34n2+21n−13), where 13, 21 & 34 are successive Fibonacci numbers!
A similar 21:34 division appears in the geometry of the 1-tree, whose 55 geometrical elements comprise 11 corners and 25 sides of 19 triangles:
21:34 division of geometrical elements in 1-tree
The number of geometrical elements in the n-tree is given by***:
N(n) = 34n + 21.

The Lower Face of the 1-tree is the red kite-shape in the diagram above at whose corners are located Tiphareth, Netzach, Hod, Yesod & Malkuth. It consists of five corners, nine sides & seven triangles, i.e., 21 geometrical elements. Six corners, 16 sides & 12 triangles, i.e., 34 elements (those in the blue section in the diagram) are added by successive, overlapping Trees because N(n+1) − N(n) = 34. The counterpart of this in the seven separate polygons of the inner Tree of Life is the fact that their 48 triangular sectors have 55 corners, those in the triangle, pentagon & decagon having 21 corners and those in the square, hexagon, octagon & dodecagon having 34 corners. Alternatively, 21 corners of the 48 sectors are either centres of the seven polygons or endpoints of their root edges, leaving 34 corners outside these sides:
21:34 division in corners of sectors of 7 polygons
In fact, this 21:34 division is found in all sacred geometries (see Article 50 (Part 1 & Part 2)). What is amazing is that it also manifests in the properties of certain sets of polygonal numbers. However, given that these sets reflect the primary 3:7 division of the Tree of Life, it may not seem so surprising that the division should appear in polygonal numbers as well as in sacred geometries.
As sn = (n2/2)(55−35/n) and bn = (n2/2)(34−20/n), sn/bn = (55−35/n)/(34−20/n), so that sn/bn → 55/34 as n→∞. The ratio of successive numbers in the Fibonacci series tends to the limiting value of the Golden Ratio Φ (= 1.618033...) as these numbers become larger and larger. 55/34 =1.61764... , which is already within 0.024% of Φ, so that the ratio of sn/bn converges towards a limit of 55/34 that approximates closely to the Golden Ratio. The same conclusion applies to the running sums of sn and cn as n→∞ because Σn = 5n(n+1)(11n−5)/6 and cn = n(n+1)(34n−13)/6, so that Σn/cn = 5(11n−5)/(34n−13) = (55/34)(1−5/11n)/(1−13/34n) → 55/34 as n→∞. 
21:34 division of corners of 1st 10 enfolded polygons
We can see where the numbers 55 and 34 originate by looking at the general formula for the nth polygonal number PNn = ½n[(N−2)n − (N−4)]. The coefficient of n2 is N − 2 (apart from the factor of ½). As the sum of the first 10 integers N = 3 + 4 + 5 +... + 12 = 75, the coefficient of n2 (apart from the factor of ½) in the sum of the first 10 polygonal numbers = 75 − 2×10 = 55. As the sum of the seven different integers N corresponding to the seven regular polygons in the inner Tree of Life = 3 + 4 + 5 + 6 + 8 + 10 + 12 = 48, the coefficient of n2 in the sum of the seven types of polygonal numbers that correspond to them = 48 − 7×2 = 34. The Fibonacci number 34 appears because the seven polygons 'happen' to have 48 corners, whilst the Fibonacci number 55 appears because the three remaining polygons in the set of the first 10 polygons have (75−48=27) corners. There are seven different sets of three polygons drawn from the first 10 that have 27 corners: (4,11,12), (5,11,12), (6,9,12), (7,8,12), (6,10,11), (7,9,11)  & (8,9,10). Corresponding to them are seven sets of seven polygons with 48 corners, one of which is that of the inner Tree of Life. The set (7, 9,11) that is absent from them is the only one of the seven sets of three polygons for which all the polygons have odd numbers of corners. In that sense, this set —and, therefore, the seven polygons of the inner Tree of Life — are unique. If we impose the condition that there should be seven polygonal numbers for given n whose sum has the Fibonacci constant 34 in the coefficient of n2, then their corresponding polygons must have 48 corners. If, alternatively, we impose the condition that the latter polygons have 48 corners, then there must be seven of them. Kabbalistically speaking, the former condition amounts to the fundamental distinction between the seven Sephiroth of Construction and the three members of the Supernal Triad, whose counterpart in the inner Tree of Life is the presence of its seven regular polygons and the absence of the three other polygons that complete the set of the first 10 polygons. The properties of these three absent polygons and all 10 polygons are analysed here.

* A reference to Pythagoras.

** Proof: the representation of PNn consists of the superposition of (n−1) regular polygons with 2, 3, 4, ...n dots along each of their N edges. The rth polygon has r dots per edge. The total number of dots in (n−1) separate polygons is


Σ Nr = ½nN(n−1).


Of these, there are

2 + 3 + 4 +... + n−1 = ½n(n+1) − 1

dots along one set of edges and

         1 + 2 + 3 +... + n−1 = ½n(n−1)

dots along the set of adjacent edges. The total number of shared dots when the polygons are superimposed is

½n(n+1) − 1 + ½n(n−1) = n2  − 1.

The total number of unshared yods is

½nN(n−1) − (n21) = ½n[[(N−2)n − N] + 1.

Superimposed, the (n−1) polygons have n dots along one shared edge and (n−1) dots along the adjacent shared edge. The total number of dots in the representation is

PNn = (n−1) + n + ½n[(N−2)n − N] + 1

= ½n[(N−2)n − (N−4)].


*** Proof: the n-tree has (12n+7) triangles with (6n+5) corners and (16n+9) sides. Number of corners, sides & triangles in the n-tree = 34n + 21.