OFFSET
0,1
LINKS
M. E. Fisher and D. S. Gaunt, Ising model and self-avoiding walks on hypercubical lattices and "high-density" expansions, Phys. Rev. 133 (1964) A224-A239.
FORMULA
Sum_{n>=0} a(n) * v^(2*n+1) = v*q/2 + (1-v^2) * f'(v) / f(v), where f(v) = Sum_{n>=0} A030044(n) * v^(2*n) and q = 8 is the number of nearest neighbors. - Andrey Zabolotskiy, Feb 16 2022
CROSSREFS
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
a(5)-a(7) from Andrey Zabolotskiy, Feb 16 2022
STATUS
approved