OFFSET
0,2
COMMENTS
The next term has 146 digits.
FORMULA
a(n) ~ 2^(2*n^3/3 + 5*n^2/4 + 2*n/3 + 1/24) * Pi^(n*(n+1)/4) * n^(5*n^3/6 + 5*n^2/4 + 5*n/12) / exp(31*n^3/36 + 7*n^2/8 - 1/24).
For n>=1, a(n) = a(n-1) * A368132(n) * (2*n-1)!^n.
MATHEMATICA
Table[Product[(n + k)!^k, {k, 0, n}], {n, 0, 8}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Apr 19 2024
STATUS
approved