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.

A189986 Numbers of the form 4k+1 having exactly 4 divisors.

Table of values

n a(n)
1 21
2 33
3 57
4 65
5 69
6 77
7 85
8 93
9 125
10 129
11 133
12 141
13 145
14 161
15 177
16 185
17 201
18 205
19 209
20 213
21 217
22 221
23 237
24 249
25 253
26 265
27 301
28 305
29 309
30 321
31 329
32 341
33 365
34 377
35 381
36 393
37 413
38 417
39 437
40 445
41 453
42 469
43 473
44 481
45 485
46 489
47 493
48 497
49 501
50 505
51 517
52 533
53 537
54 545

List of values

[21, 33, 57, 65, 69, 77, 85, 93, 125, 129, 133, 141, 145, 161, 177, 185, 201, 205, 209, 213, 217, 221, 237, 249, 253, 265, 301, 305, 309, 321, 329, 341, 365, 377, 381, 393, 413, 417, 437, 445, 453, 469, 473, 481, 485, 489, 493, 497, 501, 505, 517, 533, 537, 545]