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A172486
as a simple table
n
a(n)
0
0
1
1
2
0
3
1
4
0
5
0
6
0
7
0
8
0
9
1
10
0
11
0
12
0
13
1
14
0
15
1
16
0
17
0
18
0
19
1
[0,1,0,1,0,0,0,0,0,1,0,0,0,1,0,1,0,0,0,1]
