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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.

A308483 Irregular triangle read by rows: T(n,k) = Farey(n,k+1) - Farey(n,k) where Farey(n,k) = A006842(n,k)/A006843(n,k).

Table of values

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

List of values

[1, 2, 2, 3, 6, 6, 3, 4, 12, 6, 6, 12, 4, 5, 20, 12, 15, 10, 10, 15, 12, 20, 5, 6, 30, 20, 12, 15, 10, 10, 15, 12, 20, 30, 6, 7, 42, 30, 20, 28, 21, 15, 35, 14, 14, 35, 15, 21, 28, 20, 30, 42, 7, 8, 56, 42, 30, 20, 28, 21, 24, 40, 35, 14, 14, 35, 40, 24, 21, 28, 20, 30, 42, 56, 8]

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