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A179973 as a simple table

n a(n)
1 1
2 2
3 4
4 12
5 42
6 216
7 1200
8 8664

[1,2,4,12,42,216,1200,8664]

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Last modified November 29 18:41 EST 2021. Contains 349416 sequences. (Running on oeis4.)