OFFSET
0,4
LINKS
Robert Israel, Table of n, a(n) for n = 0..3925
N. J. A. Sloane, Transforms
FORMULA
G.f.: 1/(1 - x*Product_{k>=1} (1 - x^k)^k).
a(0) = 1; a(n) = Sum_{k=1..n} A073592(k-1)*a(n-k).
MAPLE
N:= 100: # for a(0)..a(N)
S:= series(1/(1-x*mul((1-x^k)^k, k=1..N)), x, N+1):
seq(coeff(S, x, i), i=0..N); # Robert Israel, Feb 05 2023
MATHEMATICA
nmax = 38; CoefficientList[Series[1/(1 - x Product[(1 - x^k)^k, {k, 1, nmax}]), {x, 0, nmax}], x]
CROSSREFS
KEYWORD
sign
AUTHOR
Ilya Gutkovskiy, Feb 05 2018
STATUS
approved