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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.

A023238 Primes p such that 10*p + 3 is also prime.

Table of values

n a(n)
1 2
2 5
3 7
4 11
5 17
6 19
7 23
8 29
9 31
10 37
11 43
12 59
13 61
14 67
15 73
16 101
17 103
18 109
19 137
20 149
21 173
22 191
23 193
24 197
25 199
26 211
27 227
28 229
29 233
30 239
31 263
32 269
33 271
34 283
35 331
36 337
37 353
38 359
39 367
40 373
41 379
42 383
43 401
44 409
45 449
46 467
47 479
48 499
49 523
50 541
51 557
52 569
53 607
54 613
55 617
56 647
57 673
58 683

List of values

[2, 5, 7, 11, 17, 19, 23, 29, 31, 37, 43, 59, 61, 67, 73, 101, 103, 109, 137, 149, 173, 191, 193, 197, 199, 211, 227, 229, 233, 239, 263, 269, 271, 283, 331, 337, 353, 359, 367, 373, 379, 383, 401, 409, 449, 467, 479, 499, 523, 541, 557, 569, 607, 613, 617, 647, 673, 683]