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.

A121259 Numbers k such that (3*k^2 + 1)/4 is prime.

Table of values

n a(n)
1 3
2 5
3 7
4 9
5 13
6 19
7 21
8 23
9 27
10 29
11 35
12 47
13 49
14 51
15 55
16 57
17 61
18 65
19 69
20 75
21 77
22 83
23 85
24 91
25 97
26 99
27 105
28 111
29 117
30 125
31 127
32 133
33 135
34 149
35 161
36 163
37 173
38 177
39 181
40 183
41 187
42 191
43 211
44 217
45 239
46 247
47 251
48 257
49 259
50 273
51 281
52 285
53 295
54 307
55 313
56 315
57 317
58 329
59 331
60 341

List of values

[3, 5, 7, 9, 13, 19, 21, 23, 27, 29, 35, 47, 49, 51, 55, 57, 61, 65, 69, 75, 77, 83, 85, 91, 97, 99, 105, 111, 117, 125, 127, 133, 135, 149, 161, 163, 173, 177, 181, 183, 187, 191, 211, 217, 239, 247, 251, 257, 259, 273, 281, 285, 295, 307, 313, 315, 317, 329, 331, 341]