A067163 A067151(n)/n.

0, 1, 1, 3, 4, 9, 12, 14, 18, 27, 40, 42, 53, 53, 76, 79, 120, 130, 130, 154, 192, 195, 250, 273, 321, 264, 417, 403, 472, 497, 585, 519, 686, 717, 794, 819, 904, 885, 1066, 1075, 1230, 1326, 1473, 1393, 1643, 1751, 1924, 1986, 2059, 2109, 2422, 2457, 2705, 2727

Offset

5,4

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=5..58.

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. A067151.

Sequence in context: A309758 A047075 A104479 * A287450 A010394 A010427

Adjacent sequences: A067160 A067161 A067162 * A067164 A067165 A067166

Keyword

easy,nonn

Author

Sascha Kurz, Jan 06 2002

Status

approved