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A221791 as a simple table

n a(n)
1 0
2 0
3 1
4 105
5 4131
6 109702
7 4781652
8 220782560
9 12043488477
10 578442771884

[0,0,1,105,4131,109702,4781652,220782560,
 12043488477,578442771884]

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Last modified October 17 17:21 EDT 2021. Contains 348065 sequences. (Running on oeis4.)