Partition function coefficients for square lattice spin 2 Ising model.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =1a(9) =0a(10) =0a(11) =0a(12) =0a(13) =0a(14) =0a(15) =2a(16) =-1a(17) =0a(18) =0a(19) =0a(20) =0a(21) =0a(22) =10a(23) =-14a(24) =5a(25) =0a(26) =0a(27) =0a(28) =9a(29) =34