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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.

A071928 Kolakoski-(2,4) sequence: a(n) is length of n-th run.

Table of values

n a(n)
1 2
2 2
3 4
4 4
5 2
6 2
7 2
8 2
9 4
10 4
11 4
12 4
13 2
14 2
15 4
16 4
17 2
18 2
19 4
20 4
21 2
22 2
23 2
24 2
25 4
26 4
27 4
28 4
29 2
30 2
31 2
32 2
33 4
34 4
35 4
36 4
37 2
38 2
39 4
40 4
41 2
42 2
43 2
44 2
45 4
46 4
47 4
48 4
49 2
50 2
51 4
52 4
53 2
54 2
55 2
56 2
57 4
58 4
59 4
60 4
61 2
62 2
63 4
64 4
65 2
66 2
67 4
68 4
69 2
70 2
71 2
72 2
73 4
74 4
75 4
76 4
77 2
78 2
79 2
80 2
81 4
82 4
83 4
84 4
85 2
86 2
87 4
88 4
89 2
90 2
91 4
92 4
93 2
94 2
95 2
96 2
97 4
98 4
99 4
100 4
101 2
102 2
103 2
104 2
105 4

List of values

[2, 2, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 4, 4, 2, 2, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 4, 4, 2, 2, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 4, 4, 2, 2, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2, 4]

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