A055913 Column 7 of triangle A055907.

1, 14, 100, 511, 2116, 7501, 23527, 66834, 174953, 427486, 984654, 2154809, 4508722, 9067082, 17600002, 33094234, 60466665, 107632267, 187074805, 318119850, 530176267, 867294295, 1394495598, 2206460931, 3439326144

Offset: 7

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_7 for hexagonal lattices Table 1).

Formula

G.f.: x^7*B(x)/((1-x)^15*(1+x)^7*(1+x^2)^6*(1+x^2+x^4)^4*(1+x^4)^2) where B(x) is g.f. of A055916.