For the Monomer-Dimer Problem on Triangular and Hexagonal Lattices, the   New p-Expansion
  In a recent paper S. Friedland and the author presented a formal expression for lambda_d(p) of the monomer-dimer problem on a d-dimensional rectangular lattice, which involved a power series in p. Herein, we find simlar expressions for lambda_tri(p) and lambda_hex(p), the entropy per site for triangular and hexagonal lattices. 
Paul Federbush
math-ph cond-mat.stat-mech math.MP