A370954 Denominators of coefficients of the partition function per spin, lambda (divided by 2), in the very high temperature region, expressed as a power series in the parameter K^2, for the spin-1/2 Ising model on square lattice.
1, 1, 3, 45, 315, 14175, 66825, 42567525, 58046625, 1993723875, 9280784638125, 2143861251406875, 21132346621010625, 4370553505709015625, 9086380738369043484375, 564653660170076273671875
Offset: 0
Links
- Hendrik A. Kramers and Gregory H. Wannier. Statistics of the two-dimensional ferromagnet. Part I. Phys. Rev. 60 (1941), 252-262.
- Hendrik A. Kramers and Gregory H. Wannier. Statistics of the two-dimensional ferromagnet. Part II. Phys. Rev. 60 (1941), 263-276. See (41), p. 263.
- Hendrik A. Kramers and Gregory H. Wannier, Extract from page 263 of Part II.
- Wikipedia, Square lattice Ising model.
Extensions
Terms a(5) and beyond from Andrey Zabolotskiy, Mar 10 2024