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A181007 as a simple table

n a(n)
1 0
2 0
3 0
4 1
5 199
6 59805
7 41985610
8 78452652352
9 425192615407453

[0,0,0,1,199,59805,41985610,78452652352,
 425192615407453]

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Last modified September 5 16:49 EDT 2024. Contains 375700 sequences. (Running on oeis4.)