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A172561 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 1
6 137225088000
7 452489654840076972518400
8 5638345005774311804302107347272704000
9 289360589460480315988823313632867603848637000544000 

[0,0,0,0,1,137225088000,452489654840076972518400,
 5638345005774311804302107347272704000,
 28936058946048031598882331363286760384863700054400\
 0]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)