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A002027 as a simple table

n a(n)
0 1
1 2
2 2
3 6
4 38
5 390
6 6062
7 134526
8 4172198
9 178449270
10 10508108222
11 853219059726
12 95965963939958
13 15015789392011590
14 3282145108526132942
15 1005193051984479922206
16 432437051675617901246918
17 261774334771663762228012950
18 223306437526333657726283273822

[1,2,2,6,38,390,6062,134526,4172198,178449270,
 10508108222,853219059726,95965963939958,
 15015789392011590,3282145108526132942,
 1005193051984479922206,432437051675617901246918,
 261774334771663762228012950,
 223306437526333657726283273822]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)