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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.

A103708 a(n+1) = d(n)+9 where d(n) is the n-th decimal digit in the concatenation of the digits in the sequence, starting with a(1)=1.

Table of values

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

List of values

[1, 10, 10, 9, 10, 9, 18, 10, 9, 18, 10, 17, 10, 9, 18, 10, 17, 10, 9, 10, 16, 10, 9, 18, 10, 17, 10, 9, 10, 16, 10, 9, 18, 10, 9, 10, 15, 10, 9, 18, 10, 17, 10, 9, 10, 16, 10, 9, 18, 10, 9, 10, 15, 10, 9, 18, 10, 17, 10, 9, 18, 10, 9, 10, 14, 10, 9, 18, 10, 17, 10, 9, 10, 16, 10, 9, 18, 10]

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