# A011631 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 1
4 1
5 1
6 -1
7 1
8 -1
9 1
10 -1
11 -1
12 1
13 1
14 -1
15 1
16 1
17 1
18 -1
19 -1
20 1
21 1
22 1
23 1
24 -1
25 1
26 -1
27 1
28 1
29 -1
30 -1
31 1
32 -1
33 -1
34 -1
35 1
36 1
37 -1
38 1
39 1
40 -1
41 1
42 -1
43 -1
44 -1
45 1
46 -1
47 -1
48 1
49 1
50 -1
51 1
52 1
53 -1
54 -1
55 -1
56 -1
57 -1
58 1
59 -1
60 1
61 -1
62 -1
63 1
64 1
65 1
66 1
67 1
68 1
69 1
70 -1
71 -1
72 -1
73 1
74 1
75 1
76 -1
77 -1
78 -1
79 1
80 1