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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.

A095972 Number of quadratic nonresidues modulo n.

Table of values

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

List of values

[0, 0, 1, 2, 2, 2, 3, 5, 5, 4, 5, 8, 6, 6, 9, 12, 8, 10, 9, 14, 13, 10, 11, 18, 14, 12, 16, 20, 14, 18, 15, 25, 21, 16, 23, 28, 18, 18, 25, 31, 20, 26, 21, 32, 33, 22, 23, 40, 27, 28, 33, 38, 26, 32, 37, 44, 37, 28, 29, 48, 30, 30, 47, 52, 44, 42, 33, 50, 45, 46, 35, 60, 36, 36, 53]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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