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.

A015837 Numbers k such that phi(k) | sigma(k + 2).

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 9
7 10
8 12
9 13
10 18
11 21
12 22
13 25
14 28
15 36
16 38
17 40
18 42
19 45
20 52
21 55
22 58
23 60
24 90
25 93
26 108
27 112
28 117
29 130
30 152
31 153
32 156
33 175
34 180
35 182
36 187
37 208
38 222
39 226
40 228
41 246
42 258
43 264
44 280
45 306
46 310
47 313
48 380
49 396
50 468
51 490
52 504
53 532
54 592
55 609
56 628
57 700
58 715

List of values

[1, 2, 3, 4, 5, 9, 10, 12, 13, 18, 21, 22, 25, 28, 36, 38, 40, 42, 45, 52, 55, 58, 60, 90, 93, 108, 112, 117, 130, 152, 153, 156, 175, 180, 182, 187, 208, 222, 226, 228, 246, 258, 264, 280, 306, 310, 313, 380, 396, 468, 490, 504, 532, 592, 609, 628, 700, 715]