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.

A031879 Nonprime lucky numbers.

Table of values

n a(n)
1 1
2 9
3 15
4 21
5 25
6 33
7 49
8 51
9 63
10 69
11 75
12 87
13 93
14 99
15 105
16 111
17 115
18 129
19 133
20 135
21 141
22 159
23 169
24 171
25 189
26 195
27 201
28 205
29 219
30 231
31 235
32 237
33 259
34 261
35 267
36 273
37 285
38 289
39 297
40 303
41 319
42 321
43 327
44 339
45 357
46 361
47 385
48 391
49 393
50 399
51 415
52 427

List of values

[1, 9, 15, 21, 25, 33, 49, 51, 63, 69, 75, 87, 93, 99, 105, 111, 115, 129, 133, 135, 141, 159, 169, 171, 189, 195, 201, 205, 219, 231, 235, 237, 259, 261, 267, 273, 285, 289, 297, 303, 319, 321, 327, 339, 357, 361, 385, 391, 393, 399, 415, 427]