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A143136 as a simple table

n a(n)
1 1
2 2
3 12
4 128
5 1920
6 36992
7 870912
8 24232448
9 777999360
10 28309164032
11 1151292628992
12 51750540443648
13 2547747292446720
14 136336755956252672
15 7879446478581399552
16 489119124160488931328
17 32456290094449950720000 

[1,2,12,128,1920,36992,870912,24232448,777999360,
 28309164032,1151292628992,51750540443648,
 2547747292446720,136336755956252672,
 7879446478581399552,489119124160488931328,
 32456290094449950720000]

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Last modified February 2 06:48 EST 2023. Contains 360000 sequences. (Running on oeis4.)