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A219397 as a simple table

n a(n)
1 1
2 2
3 16
4 165
5 3668
6 157672
7 13982113
8 2515924143
9 901586411968
10 639594948102158

[1,2,16,165,3668,157672,13982113,2515924143,
 901586411968,639594948102158]

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Last modified October 20 18:43 EDT 2021. Contains 348118 sequences. (Running on oeis4.)