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A221453 as a simple table

n a(n)
1 0
2 1
3 2
4 7
5 25
6 102
7 456
8 2219
9 11640
10 65364
11 390646
12 2472719
13 16508791
14 115839661
15 851634863
16 6542134884
17 52384882759
18 436290809772
19 3772143122161
20 33797290492507
21 313304547351868
22 3000631062271288
23 29651208549845055

[0,1,2,7,25,102,456,2219,11640,65364,390646,
 2472719,16508791,115839661,851634863,6542134884,
 52384882759,436290809772,3772143122161,
 33797290492507,313304547351868,3000631062271288,
 29651208549845055]

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Last modified July 19 13:53 EDT 2024. Contains 374394 sequences. (Running on oeis4.)