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.

A231370 Squarefree composite numbers k such that 2 is a primitive root for all prime factors of k.

Table of values

n a(n)
1 15
2 33
3 39
4 55
5 57
6 65
7 87
8 95
9 111
10 143
11 145
12 159
13 165
14 177
15 183
16 185
17 195
18 201
19 209
20 247
21 249
22 265
23 285
24 295
25 303
26 305
27 319
28 321
29 335
30 377
31 393
32 407
33 415
34 417
35 429
36 435
37 447
38 481
39 489
40 505
41 519
42 535
43 537
44 543
45 551
46 555
47 583
48 591
49 627
50 633
51 649
52 655
53 671
54 681

List of values

[15, 33, 39, 55, 57, 65, 87, 95, 111, 143, 145, 159, 165, 177, 183, 185, 195, 201, 209, 247, 249, 265, 285, 295, 303, 305, 319, 321, 335, 377, 393, 407, 415, 417, 429, 435, 447, 481, 489, 505, 519, 535, 537, 543, 551, 555, 583, 591, 627, 633, 649, 655, 671, 681]