A055914 Column 8 of triangle A055907.

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

Offset: 8

Author

Christian G. Bower, Jun 22 2000

Keywords

• nonn

Links

• 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.