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A028312
as a simple table
n
a(n)
1
3
2
9
3
11
4
15
5
19
6
21
7
27
8
33
9
39
10
43
11
45
12
51
13
55
14
57
15
59
[3,9,11,15,19,21,27,33,39,43,45,51,55,57,59]