OFFSET
0,17
FORMULA
a(n) ~ exp(-8*n + (2*sqrt(2+sqrt(2)) - 1/2 - sqrt(2))*Pi*(n-8)) * n^(8*n) / (8!)^n.
MATHEMATICA
Table[Product[Binomial[k-1, 8] + Binomial[n-k, 8], {k, 1, n}], {n, 0, 20}]
PROG
(PARI) a(n) = prod(k=1, n, binomial(k-1, 8)+binomial(n-k, 8)) \\ Felix Fröhlich, Jan 17 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Jan 17 2019
STATUS
approved