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A018314
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
6
6
7
7
8
8
12
9
14
10
21
11
24
12
28
13
42
14
56
15
84
16
168
[1,2,3,4,6,7,8,12,14,21,24,28,42,56,84,168]