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A267620
as a simple table
n
a(n)
1
0
2
6
3
48
4
906
5
59328
6
2192682
7
131218206
8
6966218352
9
394140187926
10
22353391341810
[0,6,48,906,59328,2192682,131218206,6966218352, 394140187926,22353391341810]