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A129421 as a simple table

n a(n)
2 1
3 1
4 6
5 15
6 120
7 933
8 13303
9 252207
10 6450828
11 205475039
12 7936493756
13 363639228194

[1,1,6,15,120,933,13303,252207,6450828,205475039,
 7936493756,363639228194]

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Last modified May 24 17:34 EDT 2019. Contains 323534 sequences. (Running on oeis4.)