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A079016
as a simple table
n
a(n)
1
5
2
7
3
17
4
19
5
29
6
31
7
47
8
67
9
89
10
137
11
139
12
199
13
397
14
1601
[5,7,17,19,29,31,47,67,89,137,139,199,397,1601]