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A051250
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
5
6
6
7
8
8
9
9
10
10
12
11
14
12
18
13
20
14
24
15
30
16
42
17
60
[1,2,3,4,5,6,8,9,10,12,14,18,20,24,30,42,60]
