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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.

A094798 Number of times 1 is used in writing out all the numbers 1 through n.

Table of values

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

List of values

[1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18]

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