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A216583 as a simple table

n a(n)
0 1
1 1
2 3
3 20
4 171
5 1733
6 18962
7 215522
8 2507188
9 29635101

[1,1,3,20,171,1733,18962,215522,2507188,29635101]

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Last modified April 25 12:28 EDT 2024. Contains 371969 sequences. (Running on oeis4.)