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A356211
as a simple table
n
a(n)
1
3
2
7
3
13
4
15
5
27
6
29
7
31
8
53
9
57
10
59
11
61
12
63
13
107
14
123
15
127
[3,7,13,15,27,29,31,53,57,59,61,63,107,123,127]