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A073955 as a simple table

n a(n)
1 0
2 0
3 0
4 8
5 40
6 240
7 1120
8 4480
9 17536
10 65280

[0,0,0,8,40,240,1120,4480,17536,65280]

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Last modified September 19 03:31 EDT 2021. Contains 347550 sequences. (Running on oeis4.)