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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.

A332436 The number of even numbers <= n of the smallest nonnegative reduced residue system modulo 2*n + 1, for n >= 0.

Table of values

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

List of values

[1, 0, 1, 1, 2, 2, 3, 2, 4, 4, 4, 5, 5, 4, 7, 7, 6, 6, 9, 6, 10, 10, 6, 11, 11, 8, 13, 10, 10, 14, 15, 8, 12, 16, 12, 17, 18, 10, 16, 19, 14, 20, 16, 14, 22, 18, 16, 18, 24, 14, 25, 25, 12, 26, 27, 18, 28, 22, 18, 24, 28, 20, 25, 31, 22, 32, 28, 18, 34, 34, 24]

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