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A145743
as a simple table
n
a(n)
1
9
2
15
3
25
4
25
5
247
6
583
7
5377
8
143473
9
143473
10
143473
11
2821813
12
62087033647
13
91450844347
[9,15,25,25,247,583,5377,143473,143473,143473, 2821813,62087033647,91450844347]