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.

A094298 Numbers m such that m and its 10's complement are both semiprimes, i.e., m and 10^k - m, where k is the number of digits of m, are semiprime.

Table of values

n a(n)
1 4
2 6
3 14
4 15
5 26
6 35
7 38
8 49
9 51
10 62
11 65
12 74
13 85
14 86
15 91
16 94
17 111
18 121
19 122
20 129
21 134
22 158
23 159
24 169
25 183
26 185
27 187
28 201
29 206
30 209
31 215
32 219
33 221
34 237
35 247
36 254
37 287
38 301
39 302
40 303
41 305
42 319
43 321
44 326
45 329
46 365
47 371
48 377
49 386
50 403
51 411
52 417
53 427
54 446
55 447
56 458

List of values

[4, 6, 14, 15, 26, 35, 38, 49, 51, 62, 65, 74, 85, 86, 91, 94, 111, 121, 122, 129, 134, 158, 159, 169, 183, 185, 187, 201, 206, 209, 215, 219, 221, 237, 247, 254, 287, 301, 302, 303, 305, 319, 321, 326, 329, 365, 371, 377, 386, 403, 411, 417, 427, 446, 447, 458]

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

Content is available under The OEIS End-User License Agreement.