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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.

A096864 Function A062402(x) = sigma(phi(x)) is iterated. Starting with n, a(n) is the largest term arising in trajectory, either in transient or in terminal cycle.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 12
6 6
7 12
8 12
9 12
10 12
11 18
12 12
13 28
14 14
15 15
16 16
17 72
18 18
19 72
20 20
21 28
22 22
23 36
24 24
25 42
26 28
27 72
28 28
29 72
30 30
31 72
32 72
33 42
34 72
35 72
36 36
37 252
38 72
39 72
40 72
41 90
42 42
43 252
44 44
45 72
46 46
47 72
48 72
49 252
50 50
51 252
52 72
53 252
54 72
55 90
56 72
57 252
58 72
59 90
60 72
61 168
62 72
63 252
64 252
65 168
66 66
67 168
68 252

List of values

[1, 2, 3, 4, 12, 6, 12, 12, 12, 12, 18, 12, 28, 14, 15, 16, 72, 18, 72, 20, 28, 22, 36, 24, 42, 28, 72, 28, 72, 30, 72, 72, 42, 72, 72, 36, 252, 72, 72, 72, 90, 42, 252, 44, 72, 46, 72, 72, 252, 50, 252, 72, 252, 72, 90, 72, 252, 72, 90, 72, 168, 72, 252, 252, 168, 66, 168, 252]

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

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