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A188453 as a simple table

n a(n)
1 0
2 0
3 0
4 66
5 30090
6 18014566
7 15978843654
8 20633840650794

[0,0,0,66,30090,18014566,15978843654,
 20633840650794]

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Last modified August 7 21:19 EDT 2024. Contains 375017 sequences. (Running on oeis4.)