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A253242
as a simple table
n
a(n)
2
0
3
0
4
0
5
0
6
0
7
2
8
-1
9
0
10
0
11
1
12
0
13
0
14
1
15
1
16
0
17
2
18
0
19
1
20
1
21
0
22
0
23
2
24
1
25
0
26
1
27
-1
28
0
29
1
30
0
[0,0,0,0,0,2,-1,0,0,1,0,0,1,1,0,2,0,1,1,0,0,2,1,0, 1,-1,0,1,0]