id:A121769 - OEIS Search Results

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Number of neighbor-avoiding polygons of perimeter 2n on square lattice.

+0
1

0, 1, 0, 1, 2, 9, 36, 154, 668, 2932, 13016, 58364, 264208, 1206818, 5558724, 25803509, 120638466, 567732133, 2687937916, 12796823923, 61235363802, 294407424869, 1421635103832, 6892590800146, 33543439104796 (list; graph; listen)

	OFFSET	`1,5`
	LINKS	`I. Jensen, Table of n, a(n) for n = 1..43 (from link below)` `I. Jensen, More terms`
	CROSSREFS	`Adjacent sequences: A121766 A121767 A121768 this_sequence A121770 A121771 A121772` `Sequence in context: A037730 A029874 A052834 this_sequence A006782 A073156 A121345`
	KEYWORD	`nonn`
	AUTHOR	`njas, Aug 30 2006`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

AT&T Labs Research