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A339391
as a simple table
n
a(n)
1
1
2
2
3
2
4
2
5
2
6
3
7
3
8
3
9
3
10
3
11
3
12
4
13
4
14
4
15
4
16
5
17
5
18
5
19
5
[1,2,2,2,2,3,3,3,3,3,3,4,4,4,4,5,5,5,5]