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A186306
as a simple table
n
a(n)
1
1
2
2
3
5
4
7
5
8
6
9
7
10
8
12
9
14
10
16
11
20
12
22
13
26
14
28
15
32
16
34
17
38
18
42
[1,2,5,7,8,9,10,12,14,16,20,22,26,28,32,34,38,42]