A067167 A067155(n)/n.

0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 2, 1, 0, 2, 1, 0, 2, 1, 4, 1, 5, 0, 7, 0, 8, 3, 9, 2, 11, 5, 14, 5, 16, 1, 21, 12, 18, 13, 25, 6, 22, 11, 29, 15, 22, 9, 31, 14, 43, 22, 52, 16, 52, 30, 69, 38, 65, 36, 74, 44, 51, 34, 58, 36, 95, 37, 68, 48, 87, 54, 92, 48, 96, 63, 92, 52, 110, 80, 133

Offset

9,9

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=9..87.

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. A067155.

Sequence in context: A244526 A035394 A321101 * A255195 A194317 A096810

Adjacent sequences: A067164 A067165 A067166 * A067168 A067169 A067170

Keyword

easy,nonn

Author

Sascha Kurz, Jan 06 2002

Status

approved