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A246968 as a simple table

n a(n)
1 1
2 4
3 55
4 2008
5 153040
6 20987840
7 4672874360

[1,4,55,2008,153040,20987840,4672874360]

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Last modified August 11 09:55 EDT 2024. Contains 375059 sequences. (Running on oeis4.)