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A019018 as a simple table

n a(n)
2 3
3 7
4 42
5 190
6 884
7 5565
8 34840
9 205806
10 1247875
11 7958423
12 52883120
13 359233719
14 2459686110
15 16915593735
16 116848978672

[3,7,42,190,884,5565,34840,205806,1247875,7958423,
 52883120,359233719,2459686110,16915593735,
 116848978672]

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)