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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.

A023239 Primes p such that 10*p + 7 is also prime.

Table of values

n a(n)
1 3
2 13
3 19
4 31
5 61
6 67
7 79
8 97
9 109
10 127
11 163
12 199
13 223
14 229
15 241
16 277
17 283
18 313
19 367
20 379
21 421
22 433
23 439
24 463
25 487
26 523
27 541
28 547
29 571
30 619
31 631
32 673
33 691
34 751
35 757
36 787
37 811
38 823
39 829
40 853
41 859
42 883
43 937
44 967
45 1033
46 1093
47 1117
48 1171
49 1237
50 1249
51 1291
52 1303
53 1321

List of values

[3, 13, 19, 31, 61, 67, 79, 97, 109, 127, 163, 199, 223, 229, 241, 277, 283, 313, 367, 379, 421, 433, 439, 463, 487, 523, 541, 547, 571, 619, 631, 673, 691, 751, 757, 787, 811, 823, 829, 853, 859, 883, 937, 967, 1033, 1093, 1117, 1171, 1237, 1249, 1291, 1303, 1321]

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

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