OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..120
FORMULA
G.f.: Product_{k>=1} (1 - x^k)^(k^(4*k)).
a(n) = -(1/n)*Sum_{k=1..n} A283369(k)*a(n-k) for n > 0.
MATHEMATICA
CoefficientList[Series[Product[(1 - x^k)^(k^(4k)), {k, 1, 10}], {x, 0, 10}], x] (* Indranil Ghosh, Mar 17 2017 *)
PROG
(PARI) A(n) = sumdiv(n, d, d^(4*d + 1));
a(n) = if(n<1, 1, -(1/n) * sum(k=1, n, A(k) * a(n - k)));
for(n=0, 10, print1(a(n), ", ")) \\ Indranil Ghosh, Mar 17 2017
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Mar 17 2017
STATUS
approved