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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.

A027389 Write decimal digits for n, count endpoints (version 4).

Table of values

n a(n)
0 0
1 2
2 2
3 2
4 4
5 2
6 1
7 4
8 0
9 1
10 2
11 4
12 4
13 4
14 6
15 4
16 3
17 6
18 2
19 3
20 2
21 4
22 4
23 4
24 6
25 4
26 3
27 6
28 2
29 3
30 2
31 4
32 4
33 4
34 6
35 4
36 3
37 6
38 2
39 3
40 4
41 6
42 6
43 6
44 8
45 6
46 5
47 8
48 4
49 5
50 2
51 4
52 4
53 4
54 6
55 4
56 3
57 6
58 2
59 3
60 1
61 3
62 3
63 3
64 5
65 3
66 2
67 5
68 1
69 2
70 4
71 6
72 6
73 6
74 8
75 6
76 5
77 8
78 4
79 5
80 0

List of values

[0, 2, 2, 2, 4, 2, 1, 4, 0, 1, 2, 4, 4, 4, 6, 4, 3, 6, 2, 3, 2, 4, 4, 4, 6, 4, 3, 6, 2, 3, 2, 4, 4, 4, 6, 4, 3, 6, 2, 3, 4, 6, 6, 6, 8, 6, 5, 8, 4, 5, 2, 4, 4, 4, 6, 4, 3, 6, 2, 3, 1, 3, 3, 3, 5, 3, 2, 5, 1, 2, 4, 6, 6, 6, 8, 6, 5, 8, 4, 5, 0]

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