OFFSET
0,2
FORMULA
a(n) ~ 2^(2*n + 1/2) * n^(3*n + 3) / exp((3 - Pi/sqrt(3))*n).
MATHEMATICA
Table[Product[n^3+k^3, {k, 0, n}], {n, 0, 12}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vaclav Kotesovec, Apr 23 2016
STATUS
approved