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.

A204541 Semiprimes with semiprime "look and say" descriptions.

Table of values

n a(n)
1 4
2 14
3 15
4 21
5 22
6 35
7 38
8 55
9 57
10 74
11 87
12 95
13 119
14 143
15 145
16 166
17 187
18 205
19 215
20 217
21 247
22 253
23 254
24 259
25 278
26 287
27 289
28 291
29 305
30 314
31 335
32 339
33 341
34 394
35 403
36 407
37 427
38 471
39 493
40 505
41 514
42 515
43 517
44 538
45 553
46 559
47 565
48 589
49 614
50 622
51 623
52 629
53 633
54 634
55 649

List of values

[4, 14, 15, 21, 22, 35, 38, 55, 57, 74, 87, 95, 119, 143, 145, 166, 187, 205, 215, 217, 247, 253, 254, 259, 278, 287, 289, 291, 305, 314, 335, 339, 341, 394, 403, 407, 427, 471, 493, 505, 514, 515, 517, 538, 553, 559, 565, 589, 614, 622, 623, 629, 633, 634, 649]