OFFSET
0,2
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..80
FORMULA
Conjecture: limit n->infinity a(n)^(1/n^2) = exp(exp(-1)) = 1.444667861...
a(n) = [x^n] exp(Sum_{k>=1} (sigma_(n+1)(2*k) - sigma_(n+1)(k))*x^k/(2^n*k)). - Ilya Gutkovskiy, Apr 26 2019
MATHEMATICA
Table[SeriesCoefficient[Product[((1+x^k)/(1-x^k))^(k^n), {k, 1, n}], {x, 0, n}], {n, 0, 20}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Mar 26 2016
STATUS
approved