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A047890 as a simple table

n a(n)
1 1
2 2
3 6
4 24
5 120
6 719
7 5003
8 39429
9 344837
10 3291590
11 33835114
12 370531683
13 4285711539
14 51990339068
15 657723056000
16 8636422912277
17 117241501095189
18 1639974912709122
19 23570308719710838
20 347217077020664880
21 5231433025400049936
22 80466744544235325387

[1,2,6,24,120,719,5003,39429,344837,3291590,
 33835114,370531683,4285711539,51990339068,
 657723056000,8636422912277,117241501095189,
 1639974912709122,23570308719710838,
 347217077020664880,5231433025400049936,
 80466744544235325387]

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Last modified March 29 11:45 EDT 2024. Contains 371278 sequences. (Running on oeis4.)