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A012731 as a simple table

n a(n)
0 2
1 -32
2 283392
3 1121740800
4 157951397068800
5 14184297129466920960
6 5248874425245870210416640
7 2544005109030684773416383283200 

[2,-32,283392,1121740800,157951397068800,
 14184297129466920960,5248874425245870210416640,
 2544005109030684773416383283200]

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Last modified April 19 05:19 EDT 2024. Contains 371782 sequences. (Running on oeis4.)