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A099343
as a simple table
n
a(n)
1
1
2
6
3
65
4
632
5
6228
6
62070
7
625563
8
6248822
9
62497832
10
624987694
11
6250055390
12
62500266095
[1,6,65,632,6228,62070,625563,6248822,62497832, 624987694,6250055390,62500266095]