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A172863 as a simple table

n a(n)
1 0
2 0
3 1
4 40176
5 22989265901
6 83308687622580480
7 1590632917730889408984804
8 138992936515606925094500549847168
9 49028617232539794829106747972829351457296

[0,0,1,40176,22989265901,83308687622580480,
 1590632917730889408984804,
 138992936515606925094500549847168,
 49028617232539794829106747972829351457296]

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Last modified January 26 09:21 EST 2022. Contains 350597 sequences. (Running on oeis4.)