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A011635
as a simple table
n
a(n)
0
1
1
1
2
0
3
-1
4
-1
5
0
6
1
7
0
8
-1
9
-1
10
0
11
1
12
1
[1,1,0,-1,-1,0,1,0,-1,-1,0,1,1]
