OFFSET
0,7
FORMULA
p(x)=24 + 440*x^3 + 264*x^6 + x^12;
q(x)=x^12*p(1/x);
a(n)=coefficients(1/q(x)).
G.f.: 1 / ( 1+264*x^6+440*x^9+24*x^12 ). - R. J. Mathar, May 24 2016
MATHEMATICA
f[x_] = 24 + 440*x^3 + 264*x^6 + x^12;
g[x] = ExpandAll[x^12*f[1/x]];
a = Table[SeriesCoefficient[ Series[1/g[x], {x, 0, 50}], n], {n, 0, 50}]
CROSSREFS
KEYWORD
sign
AUTHOR
Roger L. Bagula and Gary W. Adamson, Mar 07 2009
STATUS
approved