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A055902 Column 6 of triangle A055898. 0
1, 13, 106, 615, 2850, 11087, 37626, 114177, 315805, 807520, 1930600, 4354140, 9331560, 19117980, 37630440, 71461368, 131399829, 234661713, 408100330, 692741335, 1150092658, 1870787919, 2986277658, 4684437485, 7230182505 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

LINKS

Table of n, a(n) for n=6..30.

A. J. Guttmann, Indicators of solvability for lattice models, Discrete Math., 217 (2000), 167-189 (H_6 for square lattices of Section 6).

CROSSREFS

Sequence in context: A080422 A030055 A155636 * A218093 A132261 A142364

Adjacent sequences:  A055899 A055900 A055901 * A055903 A055904 A055905

KEYWORD

nonn

AUTHOR

Christian G. Bower, Jun 13 2000

STATUS

approved

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Last modified December 10 09:33 EST 2016. Contains 278999 sequences.