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A068200 as a simple table

n a(n)
0 1
1 2
2 6
3 24
4 120
5 696
6 4536
7 32568
8 254136
9 2133816
10 19130040
11 182000952
12 1828296888
13 19311334200
14 213709376184
15 2470302259512
16 29746381049016
17 372270346391352
18 4831940144914104
19 64925998174811448
20 901626111996723384
21 12920858504042924856

[1,2,6,24,120,696,4536,32568,254136,2133816,
 19130040,182000952,1828296888,19311334200,
 213709376184,2470302259512,29746381049016,
 372270346391352,4831940144914104,
 64925998174811448,901626111996723384,
 12920858504042924856]

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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)