OFFSET
0,15
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..1000
FORMULA
G.f.: Sum_{k>=0} x^(10*k)/(Product_{j=1..k} 1 - x^(4*j))^4. - Andrew Howroyd, Sep 16 2019
MATHEMATICA
kmax = 75; Sum[x^(10k)/Product[1 - x^(4j), {j, 1, k}]^4, {k, 0, kmax}] + O[x]^kmax // CoefficientList[#, x]& (* Jean-François Alcover, Sep 23 2019 *)
PROG
(PARI) seq(n)={Vec(sum(k=0, n\10, x^(10*k)/prod(j=1, k, 1 - x^(4*j) + O(x*x^n))^4) + O(x*x^n))} \\ Andrew Howroyd, Sep 16 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved