OFFSET
0,2
FORMULA
G.f.: 1/((1-x^2)*(1-x))^7.
a(2*k)= binomial(k+10, 10)* (16*k^3+212*k^2+708*k+429)/(13*3*11);
a(2*k+1)= binomial(k+10, 10)*(16*k^3+316*k^2+1852*k+3003)/(13*3*11), k >= 0.
MATHEMATICA
CoefficientList[Series[1/((1-x^2)(1-x))^7, {x, 0, 30}], x] (* Harvey P. Dale, Dec 04 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Wolfdieter Lang, Feb 02 2001.
STATUS
approved