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A018438
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
6
6
8
7
12
8
17
9
24
10
34
11
51
12
68
13
102
14
136
15
204
16
408
[1,2,3,4,6,8,12,17,24,34,51,68,102,136,204,408]
