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.

A050715 Inserting a digit '5' between adjacent digits of n makes a prime.

Table of values

n a(n)
1 11
2 17
3 21
4 27
5 33
6 39
7 47
8 57
9 63
10 69
11 71
12 77
13 83
14 87
15 89
16 93
17 103
18 129
19 139
20 141
21 151
22 159
23 189
24 199
25 207
26 213
27 223
28 237
29 243
30 247
31 267
32 279
33 291
34 301
35 303
36 309
37 313
38 319
39 321
40 327
41 333
42 373
43 379
44 381
45 391
46 403
47 429
48 453
49 457
50 469
51 471
52 477
53 483
54 493
55 499

List of values

[11, 17, 21, 27, 33, 39, 47, 57, 63, 69, 71, 77, 83, 87, 89, 93, 103, 129, 139, 141, 151, 159, 189, 199, 207, 213, 223, 237, 243, 247, 267, 279, 291, 301, 303, 309, 313, 319, 321, 327, 333, 373, 379, 381, 391, 403, 429, 453, 457, 469, 471, 477, 483, 493, 499]