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.

A121494 Composite numbers k such that tau(k) = tau(2k+1).

Table of values

n a(n)
1 4
2 10
3 27
4 34
5 38
6 46
7 55
8 57
9 62
10 76
11 77
12 91
13 93
14 106
15 118
16 123
17 129
18 133
19 136
20 143
21 145
22 159
23 161
24 177
25 185
26 201
27 203
28 205
29 206
30 212
31 213
32 218
33 226
34 232
35 235
36 259
37 267
38 291
39 295
40 297
41 298
42 305
43 310
44 314
45 322
46 327
47 334
48 335
49 339
50 343
51 357
52 358
53 365
54 370
55 377

List of values

[4, 10, 27, 34, 38, 46, 55, 57, 62, 76, 77, 91, 93, 106, 118, 123, 129, 133, 136, 143, 145, 159, 161, 177, 185, 201, 203, 205, 206, 212, 213, 218, 226, 232, 235, 259, 267, 291, 295, 297, 298, 305, 310, 314, 322, 327, 334, 335, 339, 343, 357, 358, 365, 370, 377]