OFFSET
0,2
FORMULA
a(n) ~ exp(1/2) * n^(2*n + 2).
MATHEMATICA
Table[Product[n^2 + k, {k, 0, n}], {n, 0, 15}]
Table[n^2*Pochhammer[1 + n^2, n], {n, 0, 15}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vaclav Kotesovec, Apr 21 2016
STATUS
approved