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.

A273785 Numbers n where a composite c < n exists such that n^(c-1) == 1 (mod c^2), i.e., such that c is a "base-n Wieferich pseudoprime".

Table of values

n a(n)
1 17
2 26
3 33
4 37
5 49
6 65
7 73
8 80
9 81
10 82
11 97
12 99
13 101
14 109
15 113
16 129
17 145
18 146
19 161
20 163
21 168
22 170
23 177
24 181
25 182
26 193
27 197
28 199
29 201
30 209
31 217
32 224
33 225
34 226
35 239
36 241
37 242
38 244
39 251
40 253
41 257
42 268
43 273
44 289
45 293
46 301
47 305
48 321
49 323
50 325
51 337
52 353
53 360
54 361

List of values

[17, 26, 33, 37, 49, 65, 73, 80, 81, 82, 97, 99, 101, 109, 113, 129, 145, 146, 161, 163, 168, 170, 177, 181, 182, 193, 197, 199, 201, 209, 217, 224, 225, 226, 239, 241, 242, 244, 251, 253, 257, 268, 273, 289, 293, 301, 305, 321, 323, 325, 337, 353, 360, 361]

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

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