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A005976 as a simple table

n a(n)
1 1
2 1
3 2
4 5
5 15
6 56
7 250
8 1328
9 8069
10 54962
11 410330
12 3317302
13 28774874
14 266242936
15 2616100423
16 27205605275
17 298569256590
18 3449309394415
19 41854968275924
20 532353636671777
21 7083840662453415
22 98443312509634266
23 1426382369328881332

[1,1,2,5,15,56,250,1328,8069,54962,410330,3317302,
 28774874,266242936,2616100423,27205605275,
 298569256590,3449309394415,41854968275924,
 532353636671777,7083840662453415,
 98443312509634266,1426382369328881332]

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Last modified July 11 06:50 EDT 2024. Contains 374216 sequences. (Running on oeis4.)