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A360080
as a simple table
n
a(n)
1
1
2
7
3
7
4
7
5
91
6
3103
7
12451
8
230191
9
286867
10
1657867
11
10029811
12
29761351
13
22410151
14
98402791
15
167137543
[1,7,7,7,91,3103,12451,230191,286867,1657867, 10029811,29761351,22410151,98402791,167137543]