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A362457
as a simple table
n
a(n)
1
1
2
2
3
12
4
120
5
840
6
17136
7
22680
8
45360
9
60480
10
70560
11
433440
12
982800
[1,2,12,120,840,17136,22680,45360,60480,70560, 433440,982800]