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.

A032671 Digit '8' concatenated with a(n) is a prime.

Table of values

n a(n)
1 3
2 9
3 11
4 21
5 23
6 27
7 29
8 39
9 53
10 57
11 59
12 63
13 77
14 81
15 83
16 87
17 101
18 111
19 117
20 123
21 147
22 161
23 167
24 171
25 179
26 191
27 209
28 219
29 221
30 231
31 233
32 237
33 243
34 263
35 269
36 273
37 287
38 291
39 293
40 297
41 311
42 317
43 329
44 353
45 363
46 369
47 377
48 387
49 389
50 419
51 423
52 429
53 431
54 443
55 447

List of values

[3, 9, 11, 21, 23, 27, 29, 39, 53, 57, 59, 63, 77, 81, 83, 87, 101, 111, 117, 123, 147, 161, 167, 171, 179, 191, 209, 219, 221, 231, 233, 237, 243, 263, 269, 273, 287, 291, 293, 297, 311, 317, 329, 353, 363, 369, 377, 387, 389, 419, 423, 429, 431, 443, 447]