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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.

A248131 Start with a(0) = 1, then a(n) = three times the n-th digit of the sequence.

Table of values

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

List of values

[1, 3, 9, 27, 6, 21, 18, 6, 3, 3, 24, 18, 9, 9, 6, 12, 3, 24, 27, 27, 18, 3, 6, 9, 6, 12, 6, 21, 6, 21, 3, 24, 9, 18, 27, 18, 3, 6, 18, 6, 3, 18, 6, 3, 9, 6, 12, 27, 3, 24, 6, 21, 3, 24, 9, 18, 3, 24, 18, 9, 3, 24, 18, 9, 27, 18, 3, 6, 6, 21, 9, 6, 12, 18, 6, 3, 9, 6, 12, 27]

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