
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 35, 0, 0, 0, 0, 0, 123, 0, 0, 88, 45, 0, 0, 0, 0, 0, 51, 0, 0, 0, 165, 0, 114, 0, 118, 120, 61, 124, 0, 192, 195, 66, 67, 272, 138, 0, 568, 360, 146, 222, 600, 0, 231, 156, 237, 800, 567, 410, 664, 84, 255
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OFFSET

9,27


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=9..85.
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(9)=1 because drawing the regular 9gon with all its diagonals yields 1 9gon.


CROSSREFS

Cf. A007678, A067168, A064869, A067151, A067152, A067153, A067154, A067155, A067157, A067158, A067159.
Sequence in context: A189253 A250488 A236237 * A291452 A174593 A104785
Adjacent sequences: A067153 A067154 A067155 * A067157 A067158 A067159


KEYWORD

easy,nonn


AUTHOR

Sascha Kurz, Jan 06 2002


STATUS

approved

