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A290400
as a simple table
n
a(n)
1
3
2
7
3
13
4
17
5
19
6
23
7
29
8
37
9
53
10
71
11
101
12
149
13
157
14
317
15
347
[3,7,13,17,19,23,29,37,53,71,101,149,157,317,347]