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A032227 as a simple table

n a(n)
1 2
2 2
3 12
4 126
5 1800
6 33900
7 782880
8 21244650
9 666080520
10 23658839400
11 939138631200
12 41199513686100
13 1979493215099400
14 103374687069173520
15 5830290120994138800
16 353179917268637208750

[2,2,12,126,1800,33900,782880,21244650,666080520,
 23658839400,939138631200,41199513686100,
 1979493215099400,103374687069173520,
 5830290120994138800,353179917268637208750]

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Last modified April 25 13:27 EDT 2024. Contains 371971 sequences. (Running on oeis4.)