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A187194
as a simple table
n
a(n)
1
0
2
0
3
2304
4
156672
5
2169600
6
15220800
7
72182880
8
264520704
9
806827392
10
2144534400
11
5120913600
12
11222069760
[0,0,2304,156672,2169600,15220800,72182880, 264520704,806827392,2144534400,5120913600, 11222069760]