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A055904 Column 8 of triangle A055898. 1
1, 17, 181, 1361, 8107, 40187, 172207, 653921, 2243296, 7053912, 20568960, 56141388, 144540144, 353269224, 824102928, 1843357923, 3969216603, 8255612079, 16635486439, 32560881353, 62048339353, 115351334813 (list; graph; refs; listen; history; text; internal format)
OFFSET

8,2

LINKS

Table of n, a(n) for n=8..29.

A. J. Guttmann, Indicators of solvability for lattice models, Discrete Math., 217 (2000), 167-189 (H_8 for square lattices of Section 6).

CROSSREFS

Sequence in context: A130651 A142214 A066521 * A116964 A167578 A181401

Adjacent sequences:  A055901 A055902 A055903 * A055905 A055906 A055907

KEYWORD

nonn

AUTHOR

Christian G. Bower, Jun 13 2000

STATUS

approved

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Last modified August 20 04:46 EDT 2019. Contains 326139 sequences. (Running on oeis4.)