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A067153
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Number of regions in regular n-gon which are 6-gons.
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9
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0, 0, 0, 9, 0, 22, 0, 39, 0, 105, 48, 136, 18, 190, 120, 462, 66, 644, 72, 875, 390, 1296, 952, 1595, 450, 1891, 1472, 3201, 2346, 3640, 2124, 4773, 2698, 5577, 4000, 7298, 3444, 7912, 6336, 10980, 6532, 10904, 7824, 14651, 12150, 16779, 13260, 20299
(list; graph; refs; listen; history; internal format)
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OFFSET
| 6,4
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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.
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LINKS
| 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
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EXAMPLE
| a(9)=9 because drawing the regular 9-gon with all its diagonals yields 9 6-gons.
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CROSSREFS
| Cf. A007678, A067165, A064869, A067151, A067152, A067154, A067155, A067156, A067157, A067158, A067159.
Sequence in context: A136679 A070929 A007394 * A057405 A167354 A005066
Adjacent sequences: A067150 A067151 A067152 * A067154 A067155 A067156
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KEYWORD
| easy,nonn
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AUTHOR
| Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 06 2002
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