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.

A369005 Numbers k for which k' / gcd(k,k') is a multiple of four, where k' stands for the arithmetic derivative of k, A003415(k).

Table of values

n a(n)
1 1
2 12
3 15
4 28
5 35
6 39
7 44
8 51
9 55
10 76
11 81
12 87
13 91
14 92
15 95
16 111
17 115
18 119
19 123
20 124
21 143
22 144
23 155
24 159
25 172
26 180
27 183
28 187
29 188
30 189
31 203
32 215
33 219
34 225
35 235
36 236
37 247
38 256
39 259
40 267
41 268
42 284
43 287
44 291
45 295
46 297
47 299
48 303
49 316
50 319
51 320
52 323
53 327
54 332
55 335
56 336
57 339
58 355
59 371
60 391
61 395
62 400
63 403
64 407
65 411
66 412
67 415

List of values

[1, 12, 15, 28, 35, 39, 44, 51, 55, 76, 81, 87, 91, 92, 95, 111, 115, 119, 123, 124, 143, 144, 155, 159, 172, 180, 183, 187, 188, 189, 203, 215, 219, 225, 235, 236, 247, 256, 259, 267, 268, 284, 287, 291, 295, 297, 299, 303, 316, 319, 320, 323, 327, 332, 335, 336, 339, 355, 371, 391, 395, 400, 403, 407, 411, 412, 415]