OFFSET
0,3
COMMENTS
This sequence is obtained from the generalized Euler transform in A266964 by taking f(n) = g(n) = n^n.
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..214
FORMULA
a(0) = 1 and a(n) = (1/n) * Sum_{k=1..n} A294773(k)*a(n-k) for n > 0.
a(n) ~ n^(2*n). - Vaclav Kotesovec, Nov 08 2017
PROG
(PARI) N=20; x='x+O('x^N); Vec(1/prod(k=1, N, (1-k^k*x^k)^k^k))
(PARI) sd(n) = sumdiv(n, d, d^(d+n+1));
a(n) = if (n==0, 1, sum(k=1, n, sd(k)*a(n-k))/n); \\ Michel Marcus, Nov 10 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Nov 08 2017
STATUS
approved