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A063721 as a simple table

n a(n)
1 1
2 2
3 16
4 48
5 6480
6 331776
7 26542080
8 207360000
9 174142586880
10 5476584960000
11 8352895346933760000
12 190741334440500264960000
13 40745645800296001044480000
14 11921333402531266560000000000000000 

[1,2,16,48,6480,331776,26542080,207360000,
 174142586880,5476584960000,8352895346933760000,
 190741334440500264960000,
 40745645800296001044480000,
 11921333402531266560000000000000000]

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Last modified March 29 08:33 EDT 2023. Contains 361596 sequences. (Running on oeis4.)