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.

A028476 Greatest k such that phi(k) = phi(n), where phi is Euler's totient function.

Table of values

n a(n)
1 2
2 2
3 6
4 6
5 12
6 6
7 18
8 12
9 18
10 12
11 22
12 12
13 42
14 18
15 30
16 30
17 60
18 18
19 54
20 30
21 42
22 22
23 46
24 30
25 66
26 42
27 54
28 42
29 58
30 30
31 62
32 60
33 66
34 60
35 90
36 42
37 126
38 54
39 90
40 60
41 150
42 42
43 98
44 66
45 90
46 46
47 94
48 60
49 98
50 66
51 120
52 90
53 106
54 54
55 150
56 90
57 126
58 58
59 118
60 60
61 198
62 62
63 126
64 120
65 210
66 66
67 134

List of values

[2, 2, 6, 6, 12, 6, 18, 12, 18, 12, 22, 12, 42, 18, 30, 30, 60, 18, 54, 30, 42, 22, 46, 30, 66, 42, 54, 42, 58, 30, 62, 60, 66, 60, 90, 42, 126, 54, 90, 60, 150, 42, 98, 66, 90, 46, 94, 60, 98, 66, 120, 90, 106, 54, 150, 90, 126, 58, 118, 60, 198, 62, 126, 120, 210, 66, 134]

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

Content is available under The OEIS End-User License Agreement.