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A213591 as a simple table

n a(n)
1 1
2 1
3 4
4 24
5 178
6 1512
7 14152
8 142705
9 1528212
10 17211564
11 202460400
12 2474708496
13 31310415376
14 408815254832
15 5495451727376
16 75907303147652
17 1075685334980240
18 15618612118252960
19 232102241507321384
20 3526880759915999016
21 54755450619399484512
22 867928449982022915984

[1,1,4,24,178,1512,14152,142705,1528212,17211564,
 202460400,2474708496,31310415376,408815254832,
 5495451727376,75907303147652,1075685334980240,
 15618612118252960,232102241507321384,
 3526880759915999016,54755450619399484512,
 867928449982022915984]

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)