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.

A032664 Digit '1' concatenated with a(n) is a prime.

Table of values

n a(n)
1 1
2 3
3 7
4 9
5 13
6 27
7 31
8 37
9 39
10 49
11 51
12 57
13 63
14 67
15 73
16 79
17 81
18 91
19 93
20 97
21 99
22 103
23 109
24 117
25 123
26 129
27 151
28 153
29 163
30 171
31 181
32 187
33 193
34 201
35 213
36 217
37 223
38 229
39 231
40 237
41 249
42 259
43 277
44 279
45 283
46 289
47 291
48 297
49 301
50 303
51 307
52 319
53 321
54 327
55 361
56 367
57 373

List of values

[1, 3, 7, 9, 13, 27, 31, 37, 39, 49, 51, 57, 63, 67, 73, 79, 81, 91, 93, 97, 99, 103, 109, 117, 123, 129, 151, 153, 163, 171, 181, 187, 193, 201, 213, 217, 223, 229, 231, 237, 249, 259, 277, 279, 283, 289, 291, 297, 301, 303, 307, 319, 321, 327, 361, 367, 373]