cp's OEIS Frontend

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.

A069822 Numbers k for which there is at least one x < k such that sigma(x) = sigma(k).

Table of values

n a(n)
1 11
2 15
3 17
4 23
5 25
6 26
7 31
8 35
9 38
10 39
11 41
12 46
13 47
14 51
15 53
16 55
17 56
18 58
19 59
20 62
21 65
22 69
23 70
24 71
25 75
26 77
27 78
28 79
29 82
30 83
31 87
32 89
33 92
34 94
35 95
36 97
37 103
38 107
39 110
40 113
41 115
42 116
43 118
44 119
45 122
46 123
47 124
48 125
49 127
50 130
51 131
52 135
53 139
54 140
55 141
56 142
57 143
58 145
59 151
60 153

List of values

[11, 15, 17, 23, 25, 26, 31, 35, 38, 39, 41, 46, 47, 51, 53, 55, 56, 58, 59, 62, 65, 69, 70, 71, 75, 77, 78, 79, 82, 83, 87, 89, 92, 94, 95, 97, 103, 107, 110, 113, 115, 116, 118, 119, 122, 123, 124, 125, 127, 130, 131, 135, 139, 140, 141, 142, 143, 145, 151, 153]

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

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