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.

A002557 Odd squarefree numbers with an even number of prime factors that have no prime factors greater than 31.

Table of values

n a(n)
1 1
2 15
3 21
4 33
5 35
6 39
7 51
8 55
9 57
10 65
11 69
12 77
13 85
14 87
15 91
16 93
17 95
18 115
19 119
20 133
21 143
22 145
23 155
24 161
25 187
26 203
27 209
28 217
29 221
30 247
31 253
32 299
33 319
34 323
35 341
36 377
37 391
38 403
39 437
40 493
41 527
42 551
43 589
44 667
45 713
46 899
47 1155
48 1365
49 1785
50 1995
51 2145
52 2415
53 2805
54 3003

List of values

[1, 15, 21, 33, 35, 39, 51, 55, 57, 65, 69, 77, 85, 87, 91, 93, 95, 115, 119, 133, 143, 145, 155, 161, 187, 203, 209, 217, 221, 247, 253, 299, 319, 323, 341, 377, 391, 403, 437, 493, 527, 551, 589, 667, 713, 899, 1155, 1365, 1785, 1995, 2145, 2415, 2805, 3003]