OFFSET
10,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 10..160
FORMULA
a(n) ~ c * (3*sqrt(3)/(2*Pi))^n * n! * n^3, where c = 0.01095971939528021798... = c0 * (c0-1)^3 / (3^3 * 3!), and c0 = (1 + exp(Pi/sqrt(3))) * sqrt(3) / (2*Pi). - Vaclav Kotesovec, Aug 26 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Aug 20 2014
STATUS
approved