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.

A062721 Numbers k such that k is a product of two primes and k-2 is prime.

Table of values

n a(n)
1 4
2 9
3 15
4 21
5 25
6 33
7 39
8 49
9 55
10 69
11 85
12 91
13 111
14 115
15 129
16 133
17 141
18 159
19 169
20 183
21 201
22 213
23 235
24 253
25 259
26 265
27 295
28 309
29 319
30 339
31 355
32 361
33 381
34 391
35 403
36 411
37 445
38 451
39 469
40 481
41 489
42 493
43 501
44 505
45 511
46 543
47 559
48 565
49 573
50 579
51 589
52 633
53 649
54 655
55 679

List of values

[4, 9, 15, 21, 25, 33, 39, 49, 55, 69, 85, 91, 111, 115, 129, 133, 141, 159, 169, 183, 201, 213, 235, 253, 259, 265, 295, 309, 319, 339, 355, 361, 381, 391, 403, 411, 445, 451, 469, 481, 489, 493, 501, 505, 511, 543, 559, 565, 573, 579, 589, 633, 649, 655, 679]