8,12

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.

Table of n, a(n) for n=8..80.

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).

B. Poonen and M. Rubinstein, Mathematica programs for these sequences

Sequences formed by drawing all diagonals in regular polygon

Cf. A067154.

Sequence in context: A194801 A273901 A014573 * A125209 A263313 A071818

Adjacent sequences: A067163 A067164 A067165 * A067167 A067168 A067169

easy,nonn

Sascha Kurz, Jan 06 2002

approved