OFFSET
0,2
COMMENTS
This sequence is obtained from the generalized Euler transform in A266964 by taking f(n) = 1/5, g(n) = 25^n.
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..500
FORMULA
a(n) ~ exp(Pi*sqrt(2*n/15)) * 5^(2*n - 3/10) / (2^(7/5) * 3^(3/10) * n^(4/5)). - Vaclav Kotesovec, Apr 19 2018
MATHEMATICA
CoefficientList[Series[1/QPochhammer[25*x]^(1/5), {x, 0, 20}], x] (* Vaclav Kotesovec, Apr 19 2018 *)
CoefficientList[Series[Product[(1-(25x)^n)^(-1/5), {n, 20}], {x, 0, 20}], x] (* Harvey P. Dale, Nov 04 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Apr 19 2018
STATUS
approved