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A012924 as a simple table

n a(n)
0 1
1 2
2 3
3 6
4 21
5 82
6 399
7 2198
8 13769
9 96514
10 741659
11 6271430
12 57131613
13 564082066
14 5940252647
15 66977636630
16 799946033937
17 10133856674178
18 135255348669235
19 1901070660453382
20 28024821142319397

[1,2,3,6,21,82,399,2198,13769,96514,741659,
 6271430,57131613,564082066,5940252647,66977636630,
 799946033937,10133856674178,135255348669235,
 1901070660453382,28024821142319397]

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Last modified June 6 22:19 EDT 2023. Contains 363151 sequences. (Running on oeis4.)