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A282429
as a simple table
n
a(n)
1
1
2
2
3
4
4
5
5
7
6
8
7
11
8
13
9
14
10
16
11
17
12
19
13
22
14
23
15
26
16
28
17
29
18
31
[1,2,4,5,7,8,11,13,14,16,17,19,22,23,26,28,29,31]