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A060655
as a simple table
n
a(n)
1
2
2
4
3
6
4
8
5
11
6
14
7
18
8
21
9
24
10
28
11
32
12
37
13
41
14
46
15
51
16
55
17
60
[2,4,6,8,11,14,18,21,24,28,32,37,41,46,51,55,60]