OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..448
PROG
(PARI) N=66; x='x+O('x^N); Vec((sum(k=0, N, (k+3)!*x^k)/sum(k=0, N, (k+3)!*(-x)^k))^(1/4))
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Apr 26 2018
STATUS
approved