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A018626
as a simple table
n
a(n)
1
1
2
2
3
3
4
5
5
6
6
10
7
15
8
25
9
30
10
50
11
75
12
125
13
150
14
250
15
375
16
750
[1,2,3,5,6,10,15,25,30,50,75,125,150,250,375,750]