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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.

A077094 Numbers k such that iterating phi(sigma(k)-phi(k)) starting from k leads to the fixed point 4.

Table of values

n a(n)
1 4
2 6
3 8
4 9
5 10
6 12
7 14
8 15
9 16
10 18
11 20
12 21
13 22
14 25
15 26
16 27
17 28
18 30
19 32
20 33
21 34
22 35
23 38
24 39
25 44
26 45
27 46
28 49
29 51
30 54
31 55
32 56
33 57
34 58
35 62
36 63
37 65
38 68
39 70
40 77
41 85
42 87
43 91
44 93
45 95
46 99
47 104
48 111
49 119
50 121
51 129
52 134
53 143
54 145
55 153
56 158
57 161
58 169
59 189
60 205
61 209
62 215
63 221
64 245

List of values

[4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 25, 26, 27, 28, 30, 32, 33, 34, 35, 38, 39, 44, 45, 46, 49, 51, 54, 55, 56, 57, 58, 62, 63, 65, 68, 70, 77, 85, 87, 91, 93, 95, 99, 104, 111, 119, 121, 129, 134, 143, 145, 153, 158, 161, 169, 189, 205, 209, 215, 221, 245]

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

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