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A108640 as a simple table

n a(n)
1 1
2 2
3 6
4 60
5 1260
6 239904
7 123263712
8 872883648000
9 35330106763980000
10 15502816844111220549120
11 32196148399600498119169883520
12 2560463149313858442381787649990400000
13 717635502576022020068175045395317927056000000 

[1,2,6,60,1260,239904,123263712,872883648000,
 35330106763980000,15502816844111220549120,
 32196148399600498119169883520,
 2560463149313858442381787649990400000,
 717635502576022020068175045395317927056000000]

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Last modified July 16 17:03 EDT 2024. Contains 374358 sequences. (Running on oeis4.)