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URL: https://oeis.org/A134371

⇱ A134371 - OEIS

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A134371
a(n) = ((2n)!)^n.
10
1, 2, 576, 373248000, 2642908293365760000, 629238322197897601351680000000000, 12078744213598964456884373878200091017216000000000000
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}]
KEYWORD
nonn
AUTHOR
Artur Jasinski, Oct 22 2007
STATUS
approved