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A126564 as a simple table

n a(n)
0 0
1 0
2 -1
3 -1
4 0
5 -1
6 -1
7 0
8 -1
9 -1
10 0
11 -1
12 -1
13 0
14 0
15 -1
16 0
17 0
18 -1
19 0
20 0
21 -1
22 0
23 0
24 -1
25 -1
26 0
27 -1
28 -1
29 0
30 -1
31 -1
32 0
33 -1
34 -1
35 0
36 0
37 -1
38 0
39 0
40 -1
41 0
42 0
43 -1
44 0
45 0
46 -1
47 -1
48 0
49 -1
50 -1
51 0
52 -1
53 -1
54 0
55 -1
56 -1
57 0
58 0
59 -1
60 0
61 0
62 -1
63 0
64 0
65 -1
66 0
67 0
68 -1
69 -1
70 0
71 -1
72 -1
73 0
74 -1
75 -1
76 0
77 -1
78 -1
79 0
80 0
81 -1
82 0
83 0
84 -1
85 0
86 0
87 -1
88 0
89 0
90 -1
91 -1
92 0
93 -1
94 -1
95 0
96 -1
97 -1
98 0
99 -1
100 -1
101 0
102 0

[0,0,-1,-1,0,-1,-1,0,-1,-1,0,-1,-1,0,0,-1,0,0,-1,
 0,0,-1,0,0,-1,-1,0,-1,-1,0,-1,-1,0,-1,-1,0,0,-1,0,
 0,-1,0,0,-1,0,0,-1,-1,0,-1,-1,0,-1,-1,0,-1,-1,0,0,
 -1,0,0,-1,0,0,-1,0,0,-1,-1,0,-1,-1,0,-1,-1,0,-1,
 -1,0,0,-1,0,0,-1,0,0,-1,0,0,-1,-1,0,-1,-1,0,-1,-1,
 0,-1,-1,0,0]

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Last modified February 18 19:50 EST 2019. Contains 320262 sequences. (Running on oeis4.)