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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.

A250182 Numbers n such that Phi_28(n) is prime, where Phi is the cyclotomic polynomial.

Table of values

n a(n)
1 4
2 5
3 7
4 13
5 25
6 33
7 41
8 63
9 74
10 80
11 88
12 94
13 96
14 104
15 116
16 144
17 149
18 151
19 154
20 165
21 167
22 174
23 183
24 191
25 197
26 208
27 231
28 241
29 262
30 268
31 270
32 290
33 318
34 319
35 361
36 368
37 376
38 390
39 394
40 412
41 431
42 434
43 442
44 464
45 489
46 492
47 521
48 529
49 556
50 568
51 574
52 575
53 585
54 589
55 613
56 629
57 639
58 654
59 666
60 667
61 672
62 683
63 684

List of values

[4, 5, 7, 13, 25, 33, 41, 63, 74, 80, 88, 94, 96, 104, 116, 144, 149, 151, 154, 165, 167, 174, 183, 191, 197, 208, 231, 241, 262, 268, 270, 290, 318, 319, 361, 368, 376, 390, 394, 412, 431, 434, 442, 464, 489, 492, 521, 529, 556, 568, 574, 575, 585, 589, 613, 629, 639, 654, 666, 667, 672, 683, 684]

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

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