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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.

A023209 Primes p such that 3p + 4 is also prime.

Table of values

n a(n)
1 3
2 5
3 11
4 13
5 19
6 23
7 31
8 41
9 53
10 59
11 73
12 79
13 89
14 101
15 103
16 109
17 131
18 139
19 151
20 173
21 179
22 181
23 191
24 199
25 223
26 229
27 241
28 251
29 269
30 283
31 293
32 311
33 331
34 349
35 353
36 373
37 383
38 389
39 409
40 431
41 433
42 439
43 509
44 521
45 541
46 563
47 593
48 599
49 619
50 643
51 661
52 683
53 709
54 719
55 733
56 739
57 761

List of values

[3, 5, 11, 13, 19, 23, 31, 41, 53, 59, 73, 79, 89, 101, 103, 109, 131, 139, 151, 173, 179, 181, 191, 199, 223, 229, 241, 251, 269, 283, 293, 311, 331, 349, 353, 373, 383, 389, 409, 431, 433, 439, 509, 521, 541, 563, 593, 599, 619, 643, 661, 683, 709, 719, 733, 739, 761]