OFFSET
0,2
FORMULA
a(n) ~ n! * c * 4^n / n^(3/2), where c = 3.9289476103424541066892... - Vaclav Kotesovec, Nov 28 2017
MATHEMATICA
nmax = 19; CoefficientList[Series[1/(1 - x + ContinuedFractionK[-x, (1 - x^k)^(1/k), {k, 2, nmax}]), {x, 0, nmax}], x] Range[0, nmax]!
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Nov 28 2017
STATUS
approved