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.

A015841 Numbers k such that phi(k) | sigma(k+4).

Table of values

n a(n)
1 1
2 2
3 3
4 6
5 7
6 8
7 10
8 17
9 18
10 24
11 26
12 42
13 50
14 52
15 54
16 56
17 65
18 75
19 80
20 81
21 87
22 90
23 110
24 111
25 114
26 120
27 126
28 154
29 164
30 186
31 216
32 234
33 244
34 245
35 306
36 308
37 338
38 344
39 350
40 351
41 371
42 372
43 374
44 416
45 436
46 456
47 490
48 528
49 560
50 570
51 598
52 626
53 682
54 689
55 759
56 777
57 836
58 866

List of values

[1, 2, 3, 6, 7, 8, 10, 17, 18, 24, 26, 42, 50, 52, 54, 56, 65, 75, 80, 81, 87, 90, 110, 111, 114, 120, 126, 154, 164, 186, 216, 234, 244, 245, 306, 308, 338, 344, 350, 351, 371, 372, 374, 416, 436, 456, 490, 528, 560, 570, 598, 626, 682, 689, 759, 777, 836, 866]