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A266875
as a simple table
n
a(n)
1
0
2
1
3
1
4
3
5
1
6
3
7
1
8
3
9
1
10
3
11
1
12
3
13
1
14
3
15
4
16
3
17
1
18
9
19
1
[0,1,1,3,1,3,1,3,1,3,1,3,1,3,4,3,1,9,1]