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A323648
as a simple table
n
a(n)
1
1
2
2
3
3
4
5
5
7
6
9
7
11
8
15
9
17
10
19
11
23
12
27
13
29
14
31
15
35
16
39
[1,2,3,5,7,9,11,15,17,19,23,27,29,31,35,39]
