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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.

A193586 Number of attractors under iteration of sum of squares of digits in base n.

Table of values

n a(n)
2 1
3 5
4 1
5 6
6 9
7 13
8 10
9 8
10 9
11 9
12 20
13 13
14 12
15 35
16 7
17 15
18 7
19 21
20 27
21 37
22 24
23 36
24 32
25 26
26 10
27 36
28 27
29 28
30 10
31 56
32 22
33 26
34 23
35 63
36 39
37 27
38 19
39 67
40 9
41 36
42 40
43 54
44 54
45 48
46 18
47 73
48 52
49 75
50 18
51 117
52 52
53 74
54 22
55 65
56 48
57 53
58 45
59 44
60 43
61 18
62 30
63 67
64 39
65 49
66 87
67 111
68 15

List of values

[1, 5, 1, 6, 9, 13, 10, 8, 9, 9, 20, 13, 12, 35, 7, 15, 7, 21, 27, 37, 24, 36, 32, 26, 10, 36, 27, 28, 10, 56, 22, 26, 23, 63, 39, 27, 19, 67, 9, 36, 40, 54, 54, 48, 18, 73, 52, 75, 18, 117, 52, 74, 22, 65, 48, 53, 45, 44, 43, 18, 30, 67, 39, 49, 87, 111, 15]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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