OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..386
FORMULA
a(n) = [x^n] Product_{k>=1} 1/(1 + n*x^k).
a(n) ~ (-1)^n * n^n * (1 - 1/n + 2/n^2 - 3/n^3 + 5/n^4 - 7/n^5 + 11/n^6 - 15/n^7 + 22/n^8 - 30/n^9 + 42/n^10 - ...), for coefficients, see A000041. - Vaclav Kotesovec, Aug 21 2018
PROG
(PARI) {a(n) = polcoeff(1/prod(k=1, n, 1+n*x^k+x*O(x^n)), n)}
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Sep 09 2017
STATUS
approved