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.

A091113 Nonprimes of the form 4*k+1.

Table of values

n a(n)
1 1
2 9
3 21
4 25
5 33
6 45
7 49
8 57
9 65
10 69
11 77
12 81
13 85
14 93
15 105
16 117
17 121
18 125
19 129
20 133
21 141
22 145
23 153
24 161
25 165
26 169
27 177
28 185
29 189
30 201
31 205
32 209
33 213
34 217
35 221
36 225
37 237
38 245
39 249
40 253
41 261
42 265
43 273
44 285
45 289
46 297
47 301
48 305
49 309
50 321
51 325
52 329
53 333
54 341
55 345

List of values

[1, 9, 21, 25, 33, 45, 49, 57, 65, 69, 77, 81, 85, 93, 105, 117, 121, 125, 129, 133, 141, 145, 153, 161, 165, 169, 177, 185, 189, 201, 205, 209, 213, 217, 221, 225, 237, 245, 249, 253, 261, 265, 273, 285, 289, 297, 301, 305, 309, 321, 325, 329, 333, 341, 345]