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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.

A089002 Number of non-congruent solutions to x^2 + 2y^2 == -1 (mod n).

Table of values

n a(n)
1 1
2 2
3 2
4 4
5 6
6 4
7 8
8 0
9 6
10 12
11 10
12 8
13 14
14 16
15 12
16 0
17 16
18 12
19 18
20 24
21 16
22 20
23 24
24 0
25 30
26 28
27 18
28 32
29 30
30 24
31 32
32 0
33 20
34 32
35 48
36 24
37 38
38 36
39 28
40 0
41 40
42 32
43 42
44 40
45 36
46 48
47 48
48 0
49 56
50 60
51 32
52 56
53 54
54 36
55 60
56 0
57 36
58 60
59 58
60 48
61 62
62 64
63 48
64 0
65 84
66 40
67 66
68 64
69 48
70 96

List of values

[1, 2, 2, 4, 6, 4, 8, 0, 6, 12, 10, 8, 14, 16, 12, 0, 16, 12, 18, 24, 16, 20, 24, 0, 30, 28, 18, 32, 30, 24, 32, 0, 20, 32, 48, 24, 38, 36, 28, 0, 40, 32, 42, 40, 36, 48, 48, 0, 56, 60, 32, 56, 54, 36, 60, 0, 36, 60, 58, 48, 62, 64, 48, 0, 84, 40, 66, 64, 48, 96]

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

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