id:A037189 - OEIS Search Results

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Number of ways of placing 4n points on 2n x 2n grid so no 3 are in a line (solutions with 90 deg rotational symmetry).

+0
2

0, 0, 3, 4, 6, 4, 13, 13, 7, 16, 8, 23, 36 (list; graph; listen)

	OFFSET	`1,3`
	REFERENCES	`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.`
	LINKS	`A. Flammenkamp, Solutions of the no-three-in-line problem`
	CROSSREFS	`Cf. A000769.` `Sequence in context: A098744 A023823 A139186 this_sequence A047840 A107355 A083342` `Adjacent sequences: A037186 A037187 A037188 this_sequence A037190 A037191 A037192`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified July 25 02:12 EDT 2008. Contains 142294 sequences.