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A018494
as a simple table
n
a(n)
1
1
2
2
3
3
4
5
5
6
6
10
7
15
8
17
9
30
10
34
11
51
12
85
13
102
14
170
15
255
16
510
[1,2,3,5,6,10,15,17,30,34,51,85,102,170,255,510]