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A279407
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
5
6
6
7
9
8
8
9
12
10
15
11
18
12
21
13
25
14
28
15
33
16
32
[1,2,3,4,5,6,9,8,12,15,18,21,25,28,33,32]