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A217887 as a simple table

n a(n)
1 1
2 3
3 11
4 45
5 196
6 898
7 4272
8 21002
9 106564
10 558780
11 3037926
12 17203726
13 101981944
14 635338608 

[1,3,11,45,196,898,4272,21002,106564,558780,
 3037926,17203726,101981944,635338608]

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Last modified April 19 23:15 EDT 2024. Contains 371798 sequences. (Running on oeis4.)