id:A055909 - OEIS Search Results

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Column 3 of triangle A055907.

+0
1

1, 6, 20, 53, 121, 249, 471, 836, 1409, 2276, 3544, 5350, 7862, 11286, 15866, 21896, 29721, 39746, 52436, 68331, 88047, 112287, 141841, 177604, 220577, 271880, 332752, 404572, 488860, 587292, 701700, 834096, 986673, 1161822, 1362132 (list; graph; listen)

	OFFSET	`3,2`
	LINKS	`A. J. Guttmann, Indicators of solvability for lattice models, Discrete Math., 217 (2000), 167-189 (H_3 for hexagonal lattices of Section 6).`
	FORMULA	`G.f.: x^3(1+x)(1+x+3x^3-x^4+x^5) / ((1-x)^7(1+x)^3(1+x^2)^2).`
	CROSSREFS	`Sequence in context: A001211 A122225 A027178 this_sequence A036596 A038091 A027993` `Adjacent sequences: A055906 A055907 A055908 this_sequence A055910 A055911 A055912`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Jun 14 2000`

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Last modified September 7 15:23 EDT 2008. Contains 143483 sequences.

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