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.

A015921 Positive integers n such that 2^n == 4 (mod n).

Table of values

n a(n)
1 1
2 2
3 4
4 6
5 10
6 12
7 14
8 22
9 26
10 30
11 34
12 38
13 46
14 58
15 62
16 74
17 82
18 86
19 94
20 106
21 118
22 122
23 132
24 134
25 142
26 146
27 158
28 166
29 170
30 178
31 182
32 194
33 202
34 206
35 214
36 218
37 226
38 254
39 262
40 274
41 278
42 298
43 302
44 314
45 326
46 334
47 346
48 358
49 362
50 372
51 382
52 386
53 394
54 398
55 422
56 446

List of values

[1, 2, 4, 6, 10, 12, 14, 22, 26, 30, 34, 38, 46, 58, 62, 74, 82, 86, 94, 106, 118, 122, 132, 134, 142, 146, 158, 166, 170, 178, 182, 194, 202, 206, 214, 218, 226, 254, 262, 274, 278, 298, 302, 314, 326, 334, 346, 358, 362, 372, 382, 386, 394, 398, 422, 446]