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A145247
as a simple table
n
a(n)
1
1
2
5
3
445
4
38945
5
61129245
6
94304065705
7
2610924486436445
8
71050577480317387425
[1,5,445,38945,61129245,94304065705, 2610924486436445,71050577480317387425]