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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.

A031212 Periods of sum of 9th powers of digits iterated until the sequence becomes periodic.

Table of values

n a(n)
0 1
1 1
2 30
3 93
4 1
5 19
6 80
7 4
8 30
9 80
10 1
11 30
12 93
13 4
14 10
15 80
16 24
17 30
18 80
19 28
20 30
21 93
22 8
23 30
24 80
25 28
26 19
27 93
28 8
29 30
30 93
31 4
32 30
33 80
34 8
35 30
36 93
37 8
38 10
39 93
40 1
41 10
42 80
43 8
44 10
45 93
46 28
47 30
48 80
49 28
50 19
51 80
52 28
53 30
54 93
55 8
56 30
57 93
58 8
59 30
60 80
61 24
62 19
63 93
64 28
65 30
66 80
67 4
68 30
69 80
70 4
71 30

List of values

[1, 1, 30, 93, 1, 19, 80, 4, 30, 80, 1, 30, 93, 4, 10, 80, 24, 30, 80, 28, 30, 93, 8, 30, 80, 28, 19, 93, 8, 30, 93, 4, 30, 80, 8, 30, 93, 8, 10, 93, 1, 10, 80, 8, 10, 93, 28, 30, 80, 28, 19, 80, 28, 30, 93, 8, 30, 93, 8, 30, 80, 24, 19, 93, 28, 30, 80, 4, 30, 80, 4, 30]

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