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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A200517 Least m>0 such that n = y^2 - 7^x (mod m) has no solution, or 0 if no such m exists.

Table of values

n a(n)
0 0
1 3
2 0
3 0
4 3
5 7
6 8
7 3
8 0
9 0
10 3
11 16
12 7
13 3
14 8
15 0
16 3
17 16
18 0
19 3
20 8
21 16
22 3
23 16
24 0
25 3
26 7
27 16
28 3
29 0
30 8
31 3
32 0
33 7
34 3
35 0
36 8
37 3
38 8
39 16
40 3
41 28
42 0
43 3
44 8
45 19
46 3
47 7
48 0
49 3
50 20
51 0
52 3
53 16
54 7
55 3
56 100
57 0
58 3
59 16
60 8
61 3
62 8
63 0
64 3
65 16
66 28
67 3
68 7
69 16
70 3
71 16
72 0
73 3
74 0
75 7
76 3
77 19
78 8
79 3

List of values

[0, 3, 0, 0, 3, 7, 8, 3, 0, 0, 3, 16, 7, 3, 8, 0, 3, 16, 0, 3, 8, 16, 3, 16, 0, 3, 7, 16, 3, 0, 8, 3, 0, 7, 3, 0, 8, 3, 8, 16, 3, 28, 0, 3, 8, 19, 3, 7, 0, 3, 20, 0, 3, 16, 7, 3, 100, 0, 3, 16, 8, 3, 8, 0, 3, 16, 28, 3, 7, 16, 3, 16, 0, 3, 0, 7, 3, 19, 8, 3]

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