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A139206
as a simple table
n
a(n)
1
3
2
3
3
29
4
5
5
5
6
5
7
7
8
11
9
17
10
5
11
19
12
7
13
13
14
7
15
5
16
37
17
139
18
19
[3,3,29,5,5,5,7,11,17,5,19,7,13,7,5,37,139,19]