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A288970
as a simple table
n
a(n)
0
0
1
0
2
2
3
16
4
112
5
848
6
7032
7
64056
8
639888
9
6974928
10
82531296
11
1054724256
12
14487894144
13
212971227264
[0,0,2,16,112,848,7032,64056,639888,6974928, 82531296,1054724256,14487894144,212971227264]