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A120402 as a simple table

n a(n)
1 2
2 4
3 10
4 70
5 430
6 4090
7 86530
8 513100
9 913570
10 7914340
11 6593621380
12 9366241600 

[2,4,10,70,430,4090,86530,513100,913570,7914340,
 6593621380,9366241600]

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Last modified May 6 05:43 EDT 2024. Contains 372290 sequences. (Running on oeis4.)