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.

A206447 Composite numbers n such that sigma(n) = sigma(d) has solution for some other composite number d.

Table of values

n a(n)
1 14
2 15
3 16
4 20
5 24
6 25
7 26
8 28
9 30
10 33
11 35
12 38
13 39
14 40
15 42
16 44
17 46
18 48
19 51
20 54
21 55
22 56
23 58
24 60
25 62
26 65
27 66
28 68
29 69
30 70
31 75
32 77
33 78
34 80
35 82
36 84
37 87
38 88
39 90
40 92
41 94
42 95
43 96
44 99
45 102
46 104
47 105
48 108
49 110
50 112
51 114
52 115
53 116
54 118
55 119
56 120
57 122
58 123
59 124
60 125

List of values

[14, 15, 16, 20, 24, 25, 26, 28, 30, 33, 35, 38, 39, 40, 42, 44, 46, 48, 51, 54, 55, 56, 58, 60, 62, 65, 66, 68, 69, 70, 75, 77, 78, 80, 82, 84, 87, 88, 90, 92, 94, 95, 96, 99, 102, 104, 105, 108, 110, 112, 114, 115, 116, 118, 119, 120, 122, 123, 124, 125]

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

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