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.

A050718 Inserting a digit '8' between adjacent decimal digits of n makes a prime.

Table of values

n a(n)
1 11
2 21
3 23
4 33
5 39
6 47
7 57
8 63
9 77
10 81
11 83
12 87
13 93
14 109
15 111
16 127
17 129
18 141
19 153
20 157
21 177
22 201
23 207
24 211
25 213
26 223
27 229
28 237
29 267
30 279
31 303
32 313
33 319
34 321
35 327
36 373
37 417
38 421
39 433
40 441
41 447
42 459
43 471
44 477
45 483
46 489
47 499
48 519
49 541
50 567
51 577
52 579
53 589
54 607

List of values

[11, 21, 23, 33, 39, 47, 57, 63, 77, 81, 83, 87, 93, 109, 111, 127, 129, 141, 153, 157, 177, 201, 207, 211, 213, 223, 229, 237, 267, 279, 303, 313, 319, 321, 327, 373, 417, 421, 433, 441, 447, 459, 471, 477, 483, 489, 499, 519, 541, 567, 577, 579, 589, 607]