OFFSET
1,11
COMMENTS
Inverse Euler transform of A010051.
FORMULA
-1 + Product_{n>=1} 1/(1 - x^n)^a(n) = g.f. of A010051.
MATHEMATICA
nmax = 65; CoefficientList[Series[Sum[MoebiusMu[k] Log[1 + Sum[x^(Prime[j] k), {j, 1, nmax}]]/k, {k, 1, nmax}], {x, 0, nmax}], x] // Rest
CROSSREFS
KEYWORD
sign
AUTHOR
Ilya Gutkovskiy, May 19 2019
STATUS
approved