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A018396
as a simple table
n
a(n)
1
1
2
2
3
3
4
5
5
6
6
10
7
11
8
15
9
22
10
30
11
33
12
55
13
66
14
110
15
165
16
330
[1,2,3,5,6,10,11,15,22,30,33,55,66,110,165,330]