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.

A032668 Digit '5' concatenated with a(n) is a prime.

Table of values

n a(n)
1 3
2 9
3 21
4 23
5 41
6 47
7 57
8 63
9 69
10 71
11 77
12 87
13 93
14 99
15 101
16 107
17 113
18 119
19 147
20 153
21 167
22 171
23 179
24 189
25 197
26 209
27 227
28 231
29 233
30 237
31 261
32 273
33 279
34 281
35 297
36 303
37 309
38 323
39 333
40 347
41 351
42 381
43 387
44 393
45 399
46 407
47 413
48 417
49 419
50 431
51 437
52 441

List of values

[3, 9, 21, 23, 41, 47, 57, 63, 69, 71, 77, 87, 93, 99, 101, 107, 113, 119, 147, 153, 167, 171, 179, 189, 197, 209, 227, 231, 233, 237, 261, 273, 279, 281, 297, 303, 309, 323, 333, 347, 351, 381, 387, 393, 399, 407, 413, 417, 419, 431, 437, 441]