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A288971
as a simple table
n
a(n)
0
0
1
0
2
2
3
16
4
112
5
848
6
7008
7
63648
8
635040
9
6915168
10
81757440
11
1044161280
12
14334076800
13
210595524480
[0,0,2,16,112,848,7008,63648,635040,6915168, 81757440,1044161280,14334076800,210595524480]