A067169 A067157(n)/n.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 1, 0, 0, 5, 1, 3, 2, 1, 0, 3, 1, 2, 1, 2, 1, 3, 0, 3, 1, 6, 4, 3, 0, 2, 2, 9, 3, 1, 2, 6, 3, 10, 1, 5, 1, 15, 1, 8, 1, 10, 4, 11, 1, 11, 4, 15, 4, 15, 3, 17, 5, 14, 9, 10, 3, 10, 8, 20, 9, 18, 6, 13, 4, 12

Offset

11,19

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

Table of n, a(n) for n=11..107.

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).

Sequences formed by drawing all diagonals in regular polygon

Crossrefs

Cf. A067157.

Sequence in context: A217580 A197858 A060861 * A257927 A011339 A166243

Adjacent sequences: A067166 A067167 A067168 * A067170 A067171 A067172

Keyword

easy,nonn

Author

Sascha Kurz, Jan 06 2002

Status

approved