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A139092
as a simple table
n
a(n)
4
3
5
3
6
2
7
2
8
2
9
3
10
2
11
3
12
4
13
4
14
5
15
3
16
3
17
6
18
5
19
2
20
3
21
4
22
3
23
3
24
4
25
4
26
4
27
3
28
7
29
3
30
3
[3,3,2,2,2,3,2,3,4,4,5,3,3,6,5,2,3,4,3,3,4,4,4,3, 7,3,3]