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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.

A070450 a(n) = n^2 mod 28.

Table of values

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

List of values

[0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16]

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