OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..3000
FORMULA
a(0) = 1 and a(n) = (1/n) * Sum_{k=1..n} 2^(k-1) * A054785(k) * a(n-k) for n > 0.
a(n) ~ 2^(n - 21/8) * exp(Pi*sqrt(n/2)) / n^(7/8). - Vaclav Kotesovec, Apr 21 2018
MATHEMATICA
CoefficientList[Series[Sqrt[QPochhammer[-1, 2*x] / (2*QPochhammer[2*x])], {x, 0, 30}], x] (* Vaclav Kotesovec, Apr 21 2018 *)
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Apr 21 2018
STATUS
approved