OFFSET
0,2
FORMULA
a(n) ~ 2^(n*(2*n+1)) * exp(1/24 - 2*n^2) * n^(n*(4*n+1)/2) * Pi^(n/2). - Vaclav Kotesovec, Oct 26 2017
MATHEMATICA
Table[((2n)!)^(n), {n, 0, 10}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Oct 22 2007
STATUS
approved