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A297063
as a simple table
n
a(n)
1
7
2
9
3
13
4
19
5
31
6
37
7
43
8
61
9
67
10
91
11
103
12
109
13
127
14
157
[7,9,13,19,31,37,43,61,67,91,103,109,127,157]