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.

A342221 Integers k, not congruent to 1 mod 3, such that there is no prime of length k using digit 3 once and rest all 1.

Table of values

n a(n)
1 15
2 26
3 32
4 41
5 68
6 93
7 99
8 113
9 116
10 119
11 134
12 150
13 158
14 161
15 170
16 173
17 176
18 177
19 179
20 204
21 213
22 252
23 257
24 266
25 284
26 299
27 305
28 312
29 320
30 333
31 353
32 357
33 374
34 392
35 402
36 404
37 419
38 434
39 443
40 450
41 491
42 495
43 506
44 509
45 513
46 518
47 527
48 548
49 551
50 554
51 570
52 582
53 584
54 593

List of values

[15, 26, 32, 41, 68, 93, 99, 113, 116, 119, 134, 150, 158, 161, 170, 173, 176, 177, 179, 204, 213, 252, 257, 266, 284, 299, 305, 312, 320, 333, 353, 357, 374, 392, 402, 404, 419, 434, 443, 450, 491, 495, 506, 509, 513, 518, 527, 548, 551, 554, 570, 582, 584, 593]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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