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A179717
as a simple table
n
a(n)
4
0
5
30
6
360
7
2940
8
24640
9
211680
10
1789200
11
15222900
12
131670000
13
1153872720
14
10247485248
[0,30,360,2940,24640,211680,1789200,15222900, 131670000,1153872720,10247485248]