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A020086 as a simple table

n a(n)
0 1
1 0
2 1
3 3
4 13
5 64
6 369
7 2495
8 19338
9 169214
10 1649843
11 17735822
12 208395915
13 2657047923
14 36534408953
15 538882532060
16 8487399879954
17 142163947989232
18 2523410076808876
19 47313938940166438
20 934450294068287157

[1,0,1,3,13,64,369,2495,19338,169214,1649843,
 17735822,208395915,2657047923,36534408953,
 538882532060,8487399879954,142163947989232,
 2523410076808876,47313938940166438,
 934450294068287157]

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)