OFFSET
0,1
REFERENCES
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
G. A. Baker, Further application of the Padé approximant method to the Ising and Heisenberg models, Phys. Rev. 129 (1963) 99-102.
A. J. Guttmann and G. S. Joyce, Critical behaviour of an isotropic spin system, J. Phys. C: Solid State Phys., 6 (1973), 2691-2712. See Table 1.
FORMULA
G.f.: (v^2-1) * (-q/2*f(v)^2 - (v^2-1) * f'(v)^2 + f(v) * (2*v*f'(v) + (v^2-1)*f''(v))) / f(v)^2, where f(v) is the g.f. of A001407 and q = 12 is the number of nearest neighbors. - Andrey Zabolotskiy, Feb 15 2022
CROSSREFS
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
Better description from Steven Finch
a(8)-a(10) from Guttmann & Joyce added by Andrey Zabolotskiy, Feb 02 2022
a(11)-a(12) from Andrey Zabolotskiy, Feb 15 2022
STATUS
approved