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A189861 as a simple table

n a(n)
1 1
2 2
3 6
4 24
5 120
6 552
7 2826
8 17080
9 117816
10 943250
11 7369128
12 63533572
13 603300392
14 6280101222
15 71927971040
16 836503868762 

[1,2,6,24,120,552,2826,17080,117816,943250,
 7369128,63533572,603300392,6280101222,71927971040,
 836503868762]

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Last modified May 16 13:17 EDT 2024. Contains 372552 sequences. (Running on oeis4.)