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A303003
as a simple table
n
a(n)
2
2
3
2
4
2
5
3
6
4
7
4
8
5
9
5
10
6
11
7
12
7
13
8
14
9
15
9
16
10
17
10
18
10
19
11
20
12
[2,2,2,3,4,4,5,5,6,7,7,8,9,9,10,10,10,11,12]