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.

A278931 Semiprimes whose ternary representations are also semiprime when read as a decimal number.

Table of values

n a(n)
1 25
2 49
3 65
4 82
5 106
6 115
7 118
8 121
9 142
10 143
11 155
12 187
13 209
14 235
15 254
16 259
17 262
18 265
19 274
20 289
21 299
22 314
23 319
24 326
25 334
26 335
27 341
28 355
29 361
30 382
31 398
32 415
33 445
34 451
35 454
36 458
37 469
38 493
39 511
40 515
41 538
42 551
43 562
44 566
45 583
46 586
47 589
48 614
49 622
50 634
51 649
52 667
53 679

List of values

[25, 49, 65, 82, 106, 115, 118, 121, 142, 143, 155, 187, 209, 235, 254, 259, 262, 265, 274, 289, 299, 314, 319, 326, 334, 335, 341, 355, 361, 382, 398, 415, 445, 451, 454, 458, 469, 493, 511, 515, 538, 551, 562, 566, 583, 586, 589, 614, 622, 634, 649, 667, 679]