3,2

A. J. Guttmann, Indicators of solvability for lattice models, Discrete Math., 217 (2000), 167-189 (H_3 for square lattices of Section 6).

G.f.: x^3(1+2x+4x^2x+2x^3+x^4)/((1-x)^7(1+x)^2).

Sequence in context: A164621 A118934 A118935 this_sequence A139876 A107392 A054497

Adjacent sequences: A055896 A055897 A055898 this_sequence A055900 A055901 A055902

nonn

Christian G. Bower (bowerc(AT)usa.net), Jun 13 2000