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.

A291794 Consider Post's tag system applied to the word (100)^n; a(n) = length of first word we see that is in the cycle, if the orbit cycles, or 0 if the orbit reaches the empty string, or -1 if the orbit is unbounded.

Table of values

n a(n)
1 5
2 15
3 15
4 19
5 0
6 31
7 85
8 37
9 31
10 37
11 55
12 37
13 0
14 0
15 91
16 85
17 31
18 127
19 31
20 33
21 37
22 0
23 37
24 37
25 0
26 73
27 73
28 163
29 55
30 19
31 73
32 157
33 37
34 73
35 37
36 37
37 37
38 163
39 55
40 37
41 163
42 37
43 37
44 85
45 37
46 0
47 0
48 85
49 37
50 127
51 91
52 37
53 37
54 0
55 37
56 69
57 19
58 31
59 163
60 163
61 87
62 55
63 0
64 37
65 0
66 55

List of values

[5, 15, 15, 19, 0, 31, 85, 37, 31, 37, 55, 37, 0, 0, 91, 85, 31, 127, 31, 33, 37, 0, 37, 37, 0, 73, 73, 163, 55, 19, 73, 157, 37, 73, 37, 37, 37, 163, 55, 37, 163, 37, 37, 85, 37, 0, 0, 85, 37, 127, 91, 37, 37, 0, 37, 69, 19, 31, 163, 163, 87, 55, 0, 37, 0, 55]

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

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