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 A055914 Column 8 of triangle A055907. 2
 1, 16, 130, 748, 3459, 13612, 47141, 147116, 421040, 1119827, 2796446, 6610818, 14893276, 32150509, 66807075, 134139807, 261101457, 494074770, 911085320, 1640685080, 2890653798, 4990940719, 8456978339, 14081784408, 23068258050 (list; graph; refs; listen; history; text; internal format)
 OFFSET 8,2 LINKS Table of n, a(n) for n=8..32. A. J. Guttmann and A. R. Conway, Hexagonal lattice directed site animals, Statistical Physics on the Eve of the Twenty-First Century, ed. M. T. Batchelor, World Scientific, 1999 (H_8 for hexagonal lattices Table 1). FORMULA G.f.: x^8*B(x)/((1-x)^17*(1+x)^8*(1+x^2)^7*(1+x^2+x^4)^5*(1+x^4)^3*(1+x^2+x^4+x^6+x^8)) where B(x) is g.f. of A055917. CROSSREFS Sequence in context: A041486 A196642 A196595 * A255816 A335560 A253224 Adjacent sequences: A055911 A055912 A055913 * A055915 A055916 A055917 KEYWORD nonn AUTHOR Christian G. Bower, Jun 22 2000 STATUS approved

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Last modified September 8 20:40 EDT 2024. Contains 375759 sequences. (Running on oeis4.)