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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.

A077083 Length of iteration until a fixed point is reached when phi(sigma[n]+phi(n)) = A077080(n) is iterated with initial value of n.

Table of values

n a(n)
1 1
2 1
3 2
4 2
5 3
6 1
7 2
8 16
9 16
10 1
11 2
12 16
13 17
14 17
15 16
16 15
17 16
18 15
19 16
20 1
21 2
22 1
23 2
24 14
25 14
26 16
27 15
28 14
29 15
30 14
31 15
32 13
33 14
34 15
35 15
36 10
37 11
38 15
39 14
40 13
41 14
42 11
43 12
44 2
45 14
46 1
47 2
48 1
49 12
50 6
51 2
52 12
53 13
54 3
55 2
56 2
57 3
58 1
59 2
60 11
61 12
62 11
63 2
64 11
65 14
66 10
67 11
68 13
69 2
70 2
71 3
72 5
73 6
74 14
75 10
76 10
77 2
78 12
79 13
80 9

List of values

[1, 1, 2, 2, 3, 1, 2, 16, 16, 1, 2, 16, 17, 17, 16, 15, 16, 15, 16, 1, 2, 1, 2, 14, 14, 16, 15, 14, 15, 14, 15, 13, 14, 15, 15, 10, 11, 15, 14, 13, 14, 11, 12, 2, 14, 1, 2, 1, 12, 6, 2, 12, 13, 3, 2, 2, 3, 1, 2, 11, 12, 11, 2, 11, 14, 10, 11, 13, 2, 2, 3, 5, 6, 14, 10, 10, 2, 12, 13, 9]

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

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