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A018598
as a simple table
n
a(n)
1
1
2
2
3
4
4
5
5
7
6
10
7
14
8
20
9
25
10
28
11
35
12
50
13
70
14
100
15
140
16
175
17
350
18
700
[1,2,4,5,7,10,14,20,25,28,35,50,70,100,140,175, 350,700]