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.

A188540 Numbers k such that d(k+2) = 2*d(k) where d(k) is the number of divisors of k (A000005).

Table of values

n a(n)
1 1
2 13
3 19
4 22
5 31
6 37
7 38
8 53
9 67
10 83
11 86
12 89
13 109
14 113
15 124
16 127
17 131
18 133
19 134
20 139
21 148
22 157
23 169
24 181
25 187
26 199
27 211
28 233
29 251
30 253
31 257
32 263
33 292
34 293
35 295
36 307
37 310
38 317
39 326
40 328
41 337
42 338
43 343
44 353
45 355
46 361
47 376
48 379
49 389
50 401
51 406
52 409
53 412
54 422
55 427
56 438
57 443
58 449
59 453

List of values

[1, 13, 19, 22, 31, 37, 38, 53, 67, 83, 86, 89, 109, 113, 124, 127, 131, 133, 134, 139, 148, 157, 169, 181, 187, 199, 211, 233, 251, 253, 257, 263, 292, 293, 295, 307, 310, 317, 326, 328, 337, 338, 343, 353, 355, 361, 376, 379, 389, 401, 406, 409, 412, 422, 427, 438, 443, 449, 453]

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

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