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A053555
as a simple table
n
a(n)
2
1
3
2
4
3
5
2
6
1
7
2
8
1
9
2
10
5
11
0
12
2
13
1
14
1
15
0
16
1
[1,2,3,2,1,2,1,2,5,0,2,1,1,0,1]