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A080060
as a simple table
n
a(n)
3
3
4
6
5
9
6
13
7
17
8
23
9
29
10
36
11
43
12
50
13
59
14
60
15
79
16
90
17
101
18
112
19
123
20
138
[3,6,9,13,17,23,29,36,43,50,59,60,79,90,101,112, 123,138]