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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.

A349826 Iterate x -> A349824(x) starting at n; if trajectory reaches a fixed point then that is a(n), if it ends in the loop (28,33) then a(n) = 28, otherwise a(n) = -1.

Table of values

n a(n)
0 0
1 0
2 2
3 3
4 28
5 5
6 28
7 7
8 28
9 27
10 28
11 11
12 27
13 13
14 28
15 28
16 28
17 17
18 28
19 19
20 27
21 27
22 30
23 23
24 28
25 27
26 30
27 27
28 28
29 29
30 30
31 31
32 28
33 28
34 28
35 28
36 28
37 37
38 28
39 28
40 28
41 41
42 28
43 43
44 28
45 28
46 28
47 47
48 28
49 28
50 28
51 28
52 28
53 53
54 28
55 28
56 28
57 28
58 28
59 59
60 28
61 61
62 28
63 28
64 28
65 28
66 28

List of values

[0, 0, 2, 3, 28, 5, 28, 7, 28, 27, 28, 11, 27, 13, 28, 28, 28, 17, 28, 19, 27, 27, 30, 23, 28, 27, 30, 27, 28, 29, 30, 31, 28, 28, 28, 28, 28, 37, 28, 28, 28, 41, 28, 43, 28, 28, 28, 47, 28, 28, 28, 28, 28, 53, 28, 28, 28, 28, 28, 59, 28, 61, 28, 28, 28, 28, 28]

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

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