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.

A291180 Numbers of the form 4*k + 1 with k >= 1 that are not divisible by any prime factor of the form 4*m + 1, except themselves.

Table of values

n a(n)
1 5
2 9
3 13
4 17
5 21
6 29
7 33
8 37
9 41
10 49
11 53
12 57
13 61
14 69
15 73
16 77
17 81
18 89
19 93
20 97
21 101
22 109
23 113
24 121
25 129
26 133
27 137
28 141
29 149
30 157
31 161
32 173
33 177
34 181
35 189
36 193
37 197
38 201
39 209
40 213
41 217
42 229
43 233
44 237
45 241
46 249
47 253
48 257
49 269
50 277
51 281
52 293
53 297
54 301
55 309
56 313
57 317

List of values

[5, 9, 13, 17, 21, 29, 33, 37, 41, 49, 53, 57, 61, 69, 73, 77, 81, 89, 93, 97, 101, 109, 113, 121, 129, 133, 137, 141, 149, 157, 161, 173, 177, 181, 189, 193, 197, 201, 209, 213, 217, 229, 233, 237, 241, 249, 253, 257, 269, 277, 281, 293, 297, 301, 309, 313, 317]