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.

A228118 Numbers consisting of only odd digits such that no permutation of its digits yields a semiprime.

Table of values

n a(n)
1 1
2 3
3 5
4 7
5 11
6 13
7 17
8 31
9 37
10 71
11 73
12 79
13 97
14 99
15 113
16 117
17 131
18 135
19 153
20 171
21 199
22 311
23 315
24 333
25 337
26 351
27 373
28 513
29 531
30 555
31 577
32 711
33 733
34 757
35 775
36 777
37 919
38 991
39 999
40 1113
41 1131
42 1155
43 1179
44 1197
45 1311
46 1359
47 1377
48 1395
49 1515
50 1539
51 1551
52 1557

List of values

[1, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 79, 97, 99, 113, 117, 131, 135, 153, 171, 199, 311, 315, 333, 337, 351, 373, 513, 531, 555, 577, 711, 733, 757, 775, 777, 919, 991, 999, 1113, 1131, 1155, 1179, 1197, 1311, 1359, 1377, 1395, 1515, 1539, 1551, 1557]