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.

A118688 Semiprimes for which the sum of the digits is also a semiprime.

Table of values

n a(n)
1 4
2 6
3 9
4 15
5 22
6 33
7 46
8 51
9 55
10 69
11 77
12 82
13 86
14 87
15 91
16 95
17 118
18 121
19 123
20 141
21 145
22 158
23 159
24 177
25 185
26 194
27 202
28 213
29 217
30 226
31 235
32 249
33 253
34 262
35 267
36 301
37 303
38 321
39 329
40 334
41 339
42 361
43 365
44 393
45 411
46 415
47 437
48 446
49 447
50 451
51 473
52 482
53 489
54 501
55 505
56 514

List of values

[4, 6, 9, 15, 22, 33, 46, 51, 55, 69, 77, 82, 86, 87, 91, 95, 118, 121, 123, 141, 145, 158, 159, 177, 185, 194, 202, 213, 217, 226, 235, 249, 253, 262, 267, 301, 303, 321, 329, 334, 339, 361, 365, 393, 411, 415, 437, 446, 447, 451, 473, 482, 489, 501, 505, 514]