OFFSET
0,2
LINKS
Ray Chandler, Table of n, a(n) for n = 0..834 (terms < 10^1000)
FORMULA
a(n) ~ sqrt(3) * 16^n / (sqrt(2*Pi) * n^(3/2)). - Vaclav Kotesovec, Jan 07 2021
PROG
(PARI) a(n) = polcoef(prod(k=1, n, (x^k + 1/x^k)^4), 0); \\ Michel Marcus, Jan 07 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 12 2008
STATUS
approved