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.

A068674 Numbers which yield primes when a 3 is prefixed or appended.

Table of values

n a(n)
1 1
2 7
3 11
4 17
5 31
6 37
7 59
8 67
9 73
10 109
11 119
12 121
13 137
14 169
15 187
16 191
17 221
18 229
19 259
20 271
21 331
22 343
23 359
24 361
25 373
26 407
27 413
28 449
29 467
30 499
31 511
32 527
33 533
34 539
35 541
36 557
37 581
38 607
39 613
40 617
41 637
42 673
43 701
44 719
45 733
46 739
47 767
48 779
49 793
50 823
51 851
52 889
53 917
54 929

List of values

[1, 7, 11, 17, 31, 37, 59, 67, 73, 109, 119, 121, 137, 169, 187, 191, 221, 229, 259, 271, 331, 343, 359, 361, 373, 407, 413, 449, 467, 499, 511, 527, 533, 539, 541, 557, 581, 607, 613, 617, 637, 673, 701, 719, 733, 739, 767, 779, 793, 823, 851, 889, 917, 929]