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A329914
as a simple table
n
a(n)
1
21
2
23
3
27
4
29
5
33
6
39
7
57
8
59
9
69
10
71
11
83
12
87
13
99
14
101
15
107
[21,23,27,29,33,39,57,59,69,71,83,87,99,101,107]