Low-temperature partition function expansion for square lattice (Potts model, q=3).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =2a(5) =0a(6) =4a(7) =4a(8) =6a(9) =24a(10) =24a(11) =68a(12) =190a(13) =192a(14) =904a(15) =1420a(16) =3106a(17) =9940a(18) =14572a(19) =49268a(20) =102886a(21) =225004a(22) =652940a(23) =1301256a(24) =3513806a(25) =8591792a(26) =19326248a(27) =52781148a(28) =120709472a(29) =306339824