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.

A125626 Numbers n whose reverse binary representation has the following property: let a 0 mean "halving" and a 1 mean "k -> 3k+1". The number describes an operation k -> f_n(k). If the equation f_n(k) = k has a positive solution, n is a term in the sequence.

Table of values

n a(n)
4 4
5 8
6 16
7 32
8 33
9 34
10 36
11 40
12 48
13 64
14 65
15 66
16 68
17 72
18 80
19 96
20 128
21 129
22 130
23 131
24 132
25 133
26 134
27 136
28 137
29 138
30 140
31 144
32 145
33 146
34 148
35 152
36 160
37 161
38 162
39 164
40 168
41 176
42 192
43 193
44 194
45 196
46 200
47 208
48 224
49 256
50 257
51 258
52 259
53 260

List of values

[4, 8, 16, 32, 33, 34, 36, 40, 48, 64, 65, 66, 68, 72, 80, 96, 128, 129, 130, 131, 132, 133, 134, 136, 137, 138, 140, 144, 145, 146, 148, 152, 160, 161, 162, 164, 168, 176, 192, 193, 194, 196, 200, 208, 224, 256, 257, 258, 259, 260]

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

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