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.

A290001 Numbers k such that the iteration k -> (sigma(k)+phi(k))/2 terminates at a fraction later than at the first step.

Table of values

n a(n)
1 12
2 14
3 15
4 20
5 24
6 28
7 33
8 34
9 35
10 42
11 48
12 54
13 55
14 56
15 62
16 63
17 69
18 70
19 76
20 77
21 78
22 84
23 85
24 86
25 87
26 88
27 90
28 93
29 94
30 95
31 96
32 99
33 102
34 104
35 105
36 108
37 110
38 111
39 112
40 118
41 119
42 120
43 122
44 123
45 124
46 125
47 129
48 130
49 132
50 141
51 142
52 143
53 148
54 150

List of values

[12, 14, 15, 20, 24, 28, 33, 34, 35, 42, 48, 54, 55, 56, 62, 63, 69, 70, 76, 77, 78, 84, 85, 86, 87, 88, 90, 93, 94, 95, 96, 99, 102, 104, 105, 108, 110, 111, 112, 118, 119, 120, 122, 123, 124, 125, 129, 130, 132, 141, 142, 143, 148, 150]