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A000699 as a simple table

n a(n)
0 1
1 1
2 1
3 4
4 27
5 248
6 2830
7 38232
8 593859
9 10401712
10 202601898
11 4342263000
12 101551822350
13 2573779506192
14 70282204726396
15 2057490936366320
16 64291032462761955
17 2136017303903513184
18 75197869250518812754
19 2796475872605709079512
20 109549714522464120960474
21 4509302910783496963256400
22 194584224274515194731540740

[1,1,1,4,27,248,2830,38232,593859,10401712,
 202601898,4342263000,101551822350,2573779506192,
 70282204726396,2057490936366320,64291032462761955,
 2136017303903513184,75197869250518812754,
 2796475872605709079512,109549714522464120960474,
 4509302910783496963256400,
 194584224274515194731540740]

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Last modified April 11 00:03 EDT 2021. Contains 342877 sequences. (Running on oeis4.)