Low temperature series for spin-1/2 Ising partition function on 2D square lattice.

A002890

Low temperature series for spin-1/2 Ising partition function on 2D square lattice.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =2a(4) =5a(5) =14a(6) =44a(7) =152a(8) =566a(9) =2234a(10) =9228a(11) =39520a(12) =174271a(13) =787246a(14) =3628992a(15) =17019374a(16) =81011889a(17) =390633382a(18) =1905134695a(19) =9385453576a(20) =46653815395a(21) =233788460256

External references