

A067155


Number of regions in regular ngon which are octagons.


10



0, 0, 0, 0, 0, 13, 0, 0, 0, 34, 0, 38, 20, 0, 44, 23, 0, 50, 26, 108, 28, 145, 0, 217, 0, 264, 102, 315, 72, 407, 190, 546, 200, 656, 42, 903, 528, 810, 598, 1175, 288, 1078, 550, 1479, 780, 1166, 486, 1705, 784, 2451, 1276, 3068, 960, 3172, 1860, 4347, 2432
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OFFSET

8,6


REFERENCES

B. Poonen and M. Rubinstein, Number of Intersection Points Made by the Diagonals of a Regular Polygon, SIAM J. Discrete Mathematics, Vol. 11, pp. 135156.


LINKS

Table of n, a(n) for n=8..64.
Sascha Kurz, mgons in regular ngons
B. Poonen and M. Rubinstein, The number of intersection points made by the diagonals of a regular polygon, SIAM J. on Discrete Mathematics, Vol. 11, No. 1, 135156 (1998).
Sequences formed by drawing all diagonals in regular polygon


EXAMPLE

a(13)=13 because drawing the regular 13gon and all its diagonals yields 13 octagons.


CROSSREFS

Cf. A007678, A067167, A064869, A067151, A067152, A067153, A067154, A067156, A067157, A067158, A067159.
Sequence in context: A094896 A277118 A200065 * A277255 A255288 A221341
Adjacent sequences: A067152 A067153 A067154 * A067156 A067157 A067158


KEYWORD

easy,nonn


AUTHOR

Sascha Kurz, Jan 06 2002


STATUS

approved



