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A213640 as a simple table

n a(n)
1 1
2 2
3 12
4 132
5 2040
6 40560
7 986160
8 28344960
9 940222080
10 35350378560
11 1485586206720
12 69006955691520
13 3510875174526720
14 194162144086310400
15 11597083480958976000
16 744005639375065267200
17 51024015181398702643200
18 3725042532308649628876800
19 288434288836744276094668800

[1,2,12,132,2040,40560,986160,28344960,940222080,
 35350378560,1485586206720,69006955691520,
 3510875174526720,194162144086310400,
 11597083480958976000,744005639375065267200,
 51024015181398702643200,3725042532308649628876800,
 288434288836744276094668800]

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Last modified October 17 15:35 EDT 2021. Contains 348064 sequences. (Running on oeis4.)