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.

A241809 Semiprimes sp such that sp+2 is a prime.

Table of values

n a(n)
1 9
2 15
3 21
4 35
5 39
6 51
7 57
8 65
9 69
10 77
11 87
12 95
13 111
14 129
15 155
16 161
17 177
18 209
19 221
20 237
21 249
22 267
23 291
24 305
25 309
26 329
27 335
28 365
29 371
30 377
31 381
32 395
33 407
34 417
35 437
36 447
37 485
38 489
39 497
40 501
41 519
42 545
43 591
44 597
45 611
46 629
47 671
48 681
49 689
50 699
51 707
52 717
53 731
54 737
55 749

List of values

[9, 15, 21, 35, 39, 51, 57, 65, 69, 77, 87, 95, 111, 129, 155, 161, 177, 209, 221, 237, 249, 267, 291, 305, 309, 329, 335, 365, 371, 377, 381, 395, 407, 417, 437, 447, 485, 489, 497, 501, 519, 545, 591, 597, 611, 629, 671, 681, 689, 699, 707, 717, 731, 737, 749]