OFFSET
0,11
FORMULA
a(n) ~ exp((1 + 2*Pi*sqrt(5 - 2/sqrt(5))/5) * (n-5)) * n^(5*n) / (exp(5*n)*120^n).
MATHEMATICA
Table[Product[Binomial[k-1, 5] + Binomial[n-k, 5], {k, 1, n}], {n, 0, 20}]
PROG
(PARI) a(n) = prod(k=1, n, binomial(k-1, 5) + binomial(n-k, 5)); \\ Michel Marcus, Jan 17 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Jan 17 2019
STATUS
approved