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.

A175389 Smallest nonnegative number k such that 2^k contains n, 2n and 3n as substrings of its decimal expansion.

Table of values

n a(n)
0 10
1 17
2 18
3 29
4 50
5 87
6 86
7 31
8 70
9 62
10 101
11 147
12 86
13 124
14 93
15 144
16 82
17 81
18 157
19 113
20 100
21 110
22 146
23 110
24 88
25 96
26 141
27 158
28 94
29 69
30 79
31 75
32 123
33 244
34 192
35 297
36 181
37 168
38 128
39 255
40 101
41 140
42 197
43 182
44 147
45 228
46 111
47 189
48 224
49 303
50 288
51 510
52 321
53 289
54 232
55 432
56 342

List of values

[10, 17, 18, 29, 50, 87, 86, 31, 70, 62, 101, 147, 86, 124, 93, 144, 82, 81, 157, 113, 100, 110, 146, 110, 88, 96, 141, 158, 94, 69, 79, 75, 123, 244, 192, 297, 181, 168, 128, 255, 101, 140, 197, 182, 147, 228, 111, 189, 224, 303, 288, 510, 321, 289, 232, 432, 342]

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

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