OFFSET
1,11
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 1..10000
FORMULA
a(n) ~ Pi^2 * exp(Pi*sqrt(2*n/3)) / (8 * 3^(3/2) * n^2). - Vaclav Kotesovec, May 17 2020
G.f.: x^3 * Sum_{k>=0} x^(6*k)/Product_{j=1..2*k} (1-x^j). - Seiichi Manyama, May 15 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved