id:A001170 - OEIS Search Results

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Number of board-pair-pile polyominoes with n cells.
(Formerly M1638 N0640)

+0
3

1, 2, 6, 19, 63, 216, 760, 2723, 9880, 36168, 133237, 492993, 1829670, 6804267, 25336611, 94416842, 351989967, 1312471879, 4894023222, 18248301701, 68036380665, 253638655582, 945464013411, 3523978989671, 13133649924269 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`W. F. Lunnon, Counting polyominoes, pp. 347-372 of A. O. L. Atkin and B. J. Birch, editors, Computers in Number Theory. Academic Press, NY, 1971.`
	LINKS	`Moa Apagodu, Counting hexagonal lattice animals.` `D. Zeilberger, The umbral transfer-matrix method. III. Counting animals`
	CROSSREFS	`Sequence in context: A109262 A006724 A057409 this_sequence A001168 A119255 A071969` `Adjacent sequences: A001167 A001168 A001169 this_sequence A001171 A001172 A001173`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research