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A067169
A067157(n)/n.
1
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.
CROSSREFS
Cf. A067157.
Sequence in context: A217580 A197858 A060861 * A257927 A011339 A166243
KEYWORD
easy,nonn
AUTHOR
Sascha Kurz, Jan 06 2002
STATUS
approved