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A018599
as a simple table
n
a(n)
1
1
2
2
3
3
4
6
5
9
6
13
7
18
8
26
9
27
10
39
11
54
12
78
13
117
14
234
15
351
16
702
[1,2,3,6,9,13,18,26,27,39,54,78,117,234,351,702]