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A191095
as a simple table
n
a(n)
1
1
2
5
3
45
4
485
5
5775
6
73437
7
979335
8
13536225
9
192393410
10
2796392165
[1,5,45,485,5775,73437,979335,13536225,192393410, 2796392165]