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Search: id:A037185
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| A037185 |
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Number of ways of placing 2n points on n X n grid so no 3 are in a line (solutions with no symmetry). |
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+0
2
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| 0, 0, 0, 0, 3, 4, 11, 40, 41, 132, 122, 524, 407, 1284, 3681, 5683, 6800, 18853
(list; graph; listen)
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OFFSET
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1,5
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REFERENCES
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A. Flammenkamp, Progress in the no-three-in-line problem, J. Combinat. Theory A 60 (1992), 305-311.
A. Flammenkamp, Progress in the no-three-in-line problem. II. J. Combin. Theory Ser. A 81 (1998), no. 1, 108-113.
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LINKS
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Benjamin Chaffin, No-Three-In-Line Problem.
A. Flammenkamp, Solutions of the no-three-in-line problem
A. Flammenkamp, Solutions of the no-three-in-line problem
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CROSSREFS
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Cf. A000769, A000755.
Sequence in context: A038559 A119042 A042273 this_sequence A101982 A041947 A102013
Adjacent sequences: A037182 A037183 A037184 this_sequence A037186 A037187 A037188
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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a(17) and a(18) from Benjamin Chaffin (chaffin(AT)gmail.com), Apr 05 2006
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