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A292760 as a simple table

n a(n)
0 0
1 1
2 5
3 20
4 83
5 375
6 1860
7 10205
8 61701
9 409240
10 2959775
11 23209055
12 196266104
13 1781241825
14 17274311925
15 178313963300
16 1952338563867
17 22601633554855
18 275867860584620
19 3540918330014765
20 47682832410552965
21 672211363480355880
22 9901286664553498695
23 152101199645144064575

[0,1,5,20,83,375,1860,10205,61701,409240,2959775,
 23209055,196266104,1781241825,17274311925,
 178313963300,1952338563867,22601633554855,
 275867860584620,3540918330014765,
 47682832410552965,672211363480355880,
 9901286664553498695,152101199645144064575]

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Last modified December 8 20:37 EST 2021. Contains 349596 sequences. (Running on oeis4.)