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A000940 as a simple table

n a(n)
3 1
4 2
5 4
6 12
7 39
8 202
9 1219
10 9468
11 83435
12 836017
13 9223092
14 111255228
15 1453132944
16 20433309147
17 307690667072
18 4940118795869
19 84241805734539
20 1520564059349452
21 28963120073957838
22 580578894859915650
23 12217399235411398127
24 269291841184184374868
25 6204484017822892034404

[1,2,4,12,39,202,1219,9468,83435,836017,9223092,
 111255228,1453132944,20433309147,307690667072,
 4940118795869,84241805734539,1520564059349452,
 28963120073957838,580578894859915650,
 12217399235411398127,269291841184184374868,
 6204484017822892034404]

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Last modified March 8 20:14 EST 2021. Contains 341953 sequences. (Running on oeis4.)