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A047712
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High-temperature coefficients for internal energy for spin-1/2 Ising model on f.c.c. lattice.
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4
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6, 24, 132, 816, 5448, 38808, 290568, 2255232, 17981532, 146428728, 1213014960, 10192820592, 86687830596, 744919762584
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OFFSET
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1,1
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LINKS
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FORMULA
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G.f. 6*v + 24*v^2 + 132*v^3 + 816*v^4 ... = v*q/2 + (1-v^2) * f'(v) / f(v), where f(v) = 1 + 8*v^3 + 33*v^4 + ... is the g.f. of A001407 and q = 12 is the number of nearest neighbors. - Andrey Zabolotskiy, Feb 14 2022
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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