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A221204 as a simple table

n a(n)
1 0
2 1681
3 976
4 20277009
5 433687328
6 420771471561
7 29037336149952
8 10986555692499984

[0,1681,976,20277009,433687328,420771471561,
 29037336149952,10986555692499984]

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Last modified October 18 17:09 EDT 2021. Contains 348068 sequences. (Running on oeis4.)