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A018990 as a simple table

n a(n)
2 0
3 10
4 20
5 244
6 1028
7 7831
8 45586
9 320653
10 2114588
11 14817954
12 102950126
13 731851644
14 5225037928
15 37735447458
16 274238573658 

[0,10,20,244,1028,7831,45586,320653,2114588,
 14817954,102950126,731851644,5225037928,
 37735447458,274238573658]

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Last modified April 19 02:28 EDT 2024. Contains 371782 sequences. (Running on oeis4.)