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A018534
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
6
6
7
7
12
8
14
9
21
10
28
11
42
12
49
13
84
14
98
15
147
16
196
17
294
18
588
[1,2,3,4,6,7,12,14,21,28,42,49,84,98,147,196,294, 588]