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A118991 as a simple table

n a(n)
1 1
2 5
3 39
4 753
5 25887
6 1842241
7 247531775

[1,5,39,753,25887,1842241,247531775]

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Last modified May 4 02:59 EDT 2024. Contains 372225 sequences. (Running on oeis4.)