OFFSET
0,2
FORMULA
a(n) ~ exp(Pi*sqrt(2*n/3)) * 2^(2*n - 7/4) / (sqrt(Pi) * 3^(1/4) * n^(3/4)).
a(n) = Sum_{j=0..n} A325948(j)*4^(n-j).
MATHEMATICA
nmax = 30; CoefficientList[Series[1/(1-x)^(1/2) * Product[1/(1-x^k), {k, 1, nmax}], {x, 0, nmax}], x] * 4^Range[0, nmax]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, May 28 2019
STATUS
approved