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A190834 as a simple table

n a(n)
1 0
2 0
3 1
4 15743
5 312841383
6 10691055854826
7 628262652845622327

[0,0,1,15743,312841383,10691055854826,
 628262652845622327]

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Last modified September 16 23:53 EDT 2021. Contains 347477 sequences. (Running on oeis4.)