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 A067155 Number of regions in regular n-gon 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 (list; graph; refs; listen; history; text; internal format)
 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. 135-156. LINKS Sascha Kurz, m-gons in regular n-gons 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, 135-156 (1998). EXAMPLE a(13)=13 because drawing the regular 13-gon 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

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Last modified October 19 21:04 EDT 2019. Contains 328225 sequences. (Running on oeis4.)