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A272179
a(n) = Product_{k=0..n} (n^2 - k).
3
0, 0, 24, 3024, 524160, 127512000, 42072307200, 18183435621120, 9993927307714560, 6816310367682816000, 5653408585997652480000, 5606015030436835542528000, 6551662594343454506664345600, 8914054345090074511550572953600, 13970892529731225585461744812032000
OFFSET
0,3
FORMULA
a(n) ~ exp(-1/2) * n^(2*n + 2).
MATHEMATICA
Table[Product[n^2 - k, {k, 0, n}], {n, 0, 15}]
Table[(n-1)*n*Pochhammer[1 - n + n^2, n], {n, 0, 15}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vaclav Kotesovec, Apr 21 2016
STATUS
approved