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.

A108181 Semiprimes of the form 4n + 1.

Table of values

n a(n)
1 9
2 21
3 25
4 33
5 49
6 57
7 65
8 69
9 77
10 85
11 93
12 121
13 129
14 133
15 141
16 145
17 161
18 169
19 177
20 185
21 201
22 205
23 209
24 213
25 217
26 221
27 237
28 249
29 253
30 265
31 289
32 301
33 305
34 309
35 321
36 329
37 341
38 361
39 365
40 377
41 381
42 393
43 413
44 417
45 437
46 445
47 453
48 469
49 473
50 481
51 485
52 489
53 493
54 497

List of values

[9, 21, 25, 33, 49, 57, 65, 69, 77, 85, 93, 121, 129, 133, 141, 145, 161, 169, 177, 185, 201, 205, 209, 213, 217, 221, 237, 249, 253, 265, 289, 301, 305, 309, 321, 329, 341, 361, 365, 377, 381, 393, 413, 417, 437, 445, 453, 469, 473, 481, 485, 489, 493, 497]