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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.

A171181 n followed by (n - sum of digits of n).

Table of values

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

List of values

[0, 0, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 8, 0, 9, 0, 10, 9, 11, 9, 12, 9, 13, 9, 14, 9, 15, 9, 16, 9, 17, 9, 18, 9, 19, 9, 20, 18, 21, 18, 22, 18, 23, 18, 24, 18, 25, 18, 26, 18, 27, 18, 28, 18, 29, 18, 30, 27, 31, 27, 32, 27, 33, 27, 34, 27, 35, 27, 36, 27, 37, 27, 38, 27, 39, 27]

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