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.

A125870 Odd numbers k such that cos(2*Pi/k) is an algebraic number of a 7-smooth degree, but not 5-smooth.

Table of values

n a(n)
1 29
2 43
3 49
4 71
5 87
6 113
7 127
8 129
9 145
10 147
11 197
12 203
13 211
14 213
15 215
16 245
17 261
18 281
19 301
20 319
21 337
22 339
23 343
24 355
25 377
26 379
27 381
28 387
29 421
30 435
31 441
32 449
33 473
34 491
35 493
36 497
37 539
38 551
39 559
40 565
41 591
42 609
43 631
44 633
45 635
46 637
47 639
48 645
49 673
50 701
51 725
52 731

List of values

[29, 43, 49, 71, 87, 113, 127, 129, 145, 147, 197, 203, 211, 213, 215, 245, 261, 281, 301, 319, 337, 339, 343, 355, 377, 379, 381, 387, 421, 435, 441, 449, 473, 491, 493, 497, 539, 551, 559, 565, 591, 609, 631, 633, 635, 637, 639, 645, 673, 701, 725, 731]