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A257599
as a simple table
n
a(n)
1
1
2
2
3
2
4
3
5
2
6
4
7
2
8
4
9
4
10
4
11
6
12
2
13
6
14
8
15
6
[1,2,2,3,2,4,2,4,4,4,6,2,6,8,6]
