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A134381 as a simple table

n a(n)
0 1
1 2
2 5
3 15
4 52
5 205
6 921
7 4766
8 28685
9 201159
10 1630840
11 15071725
12 156331161
13 1794763970
14 22548418541
15 307236496071
16 4507944378004
17 70813851019717
18 1185225078743601
19 21049903662123422
20 395303080572770549
21 7825181077750155999
22 162835332607069248760

[1,2,5,15,52,205,921,4766,28685,201159,1630840,
 15071725,156331161,1794763970,22548418541,
 307236496071,4507944378004,70813851019717,
 1185225078743601,21049903662123422,
 395303080572770549,7825181077750155999,
 162835332607069248760]

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Last modified May 8 09:57 EDT 2021. Contains 343666 sequences. (Running on oeis4.)