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A200406 as a simple table

n a(n)
1 1
2 2
3 6
4 23
5 105
6 550
7 3228
8 20878
9 146994
10 1116000
11 9068288
12 78384726
13 717102126
14 6913783826
15 69991576572 

[1,2,6,23,105,550,3228,20878,146994,1116000,
 9068288,78384726,717102126,6913783826,69991576572]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)