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.

A131825 Numbers k such that cototient(x) = k has exactly 1 solution.

Table of values

n a(n)
1 0
2 2
3 3
4 5
5 6
6 14
7 18
8 20
9 22
10 28
11 38
12 40
13 42
14 62
15 66
16 68
17 74
18 76
19 78
20 82
21 98
22 102
23 104
24 106
25 114
26 124
27 126
28 136
29 148
30 156
31 178
32 194
33 196
34 200
35 204
36 208
37 226
38 242
39 246
40 248
41 254
42 258
43 262
44 296
45 302
46 306
47 308
48 314
49 330
50 338
51 342
52 356
53 370
54 374
55 378
56 388
57 398
58 400
59 408
60 416
61 418
62 422
63 426
64 434
65 438

List of values

[0, 2, 3, 5, 6, 14, 18, 20, 22, 28, 38, 40, 42, 62, 66, 68, 74, 76, 78, 82, 98, 102, 104, 106, 114, 124, 126, 136, 148, 156, 178, 194, 196, 200, 204, 208, 226, 242, 246, 248, 254, 258, 262, 296, 302, 306, 308, 314, 330, 338, 342, 356, 370, 374, 378, 388, 398, 400, 408, 416, 418, 422, 426, 434, 438]

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

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