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A277967
as a simple table
n
a(n)
1
0
2
1
3
2
4
1
5
1
6
0
7
1
8
0
9
1
10
1
11
1
12
1
13
0
14
0
15
0
16
1
17
2
18
3
19
4
20
1
[0,1,2,1,1,0,1,0,1,1,1,1,0,0,0,1,2,3,4,1]