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.

A316351 Numbers k such that k^2 + 1 has exactly four distinct prime factors.

Table of values

n a(n)
1 47
2 73
3 83
4 123
5 133
6 157
7 173
8 177
9 183
10 187
11 191
12 203
13 213
14 217
15 233
16 237
17 242
18 253
19 255
20 265
21 273
22 278
23 293
24 302
25 307
26 313
27 317
28 319
29 327
30 333
31 337
32 343
33 353
34 377
35 387
36 395
37 401
38 403
39 411
40 413
41 421
42 423
43 437
44 438
45 467
46 473
47 477
48 483
49 487
50 489
51 497
52 499
53 507

List of values

[47, 73, 83, 123, 133, 157, 173, 177, 183, 187, 191, 203, 213, 217, 233, 237, 242, 253, 255, 265, 273, 278, 293, 302, 307, 313, 317, 319, 327, 333, 337, 343, 353, 377, 387, 395, 401, 403, 411, 413, 421, 423, 437, 438, 467, 473, 477, 483, 487, 489, 497, 499, 507]