7,2

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).

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.

Sequence in context: A099193 A086951 A041370 this_sequence A005757 A089508 A131709

Adjacent sequences: A055910 A055911 A055912 this_sequence A055914 A055915 A055916

nonn

Christian G. Bower (bowerc(AT)usa.net), Jun 22 2000