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Partition function coefficients for square lattice spin 1 Ising model.
2

%I #19 Feb 12 2022 13:33:44

%S 1,0,0,0,1,0,0,2,-1,0,10,-14,13,30,-85,124,50,-476,1047,-642,-1949,

%T 7220,-9547,-2690,42625,-90224,62414,190074,-683506,952260,290296,

%U -4276192,9356547,-6406858,-20006212,73731040,-103077077

%N Partition function coefficients for square lattice spin 1 Ising model.

%H I. Jensen, <a href="/A010107/b010107.txt">Table of n, a(n) for n = 0..113</a> (from link below)

%H I. G. Enting, A, J. Guttmann and I. Jensen, <a href="https://arxiv.org/abs/hep-lat/9410005">Low-Temperature Series Expansions for the Spin-1 Ising Model</a>, arXiv:hep-lat/9410005, 1994; J. Phys. A. 27 (1994) 6987-7006.

%H I. Jensen, <a href="https://researchers.ms.unimelb.edu.au/~ij@unimelb/ising/series/pf1.ser">More terms</a>

%H Iwan Jensen, Anthony J. Guttmann, <a href="https://arxiv.org/abs/cond-mat/9509121">Series expansions of the percolation probability for directed square and honeycomb lattices</a>, arXiv:cond-mat/9509121, 1995; J. Phys. A 28 (1995), no. 17, 4813-4833.

%Y Cf. A010102, A010115, A010111.

%Y Cf. A010108, A010109, A010110, A056620.

%K sign

%O 0,8

%A _N. J. A. Sloane_, _Simon Plouffe_

%E "Free energy" corrected to "partition function" (basically the exponential of the free energy) in the name by _Andrey Zabolotskiy_, Feb 11 2022