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.

A125603 Numbers n such that 3n(n-1)/2 + 1 is prime.

Table of values

n a(n)
1 4
2 5
3 9
4 12
5 17
6 20
7 21
8 24
9 32
10 37
11 40
12 45
13 49
14 56
15 57
16 69
17 72
18 77
19 81
20 84
21 85
22 96
23 100
24 104
25 105
26 109
27 116
28 117
29 125
30 132
31 136
32 140
33 141
34 145
35 152
36 157
37 164
38 165
39 169
40 172
41 181
42 185
43 189
44 192
45 196
46 204
47 205
48 216
49 217
50 220
51 221
52 224
53 245
54 257
55 264
56 269
57 272
58 277

List of values

[4, 5, 9, 12, 17, 20, 21, 24, 32, 37, 40, 45, 49, 56, 57, 69, 72, 77, 81, 84, 85, 96, 100, 104, 105, 109, 116, 117, 125, 132, 136, 140, 141, 145, 152, 157, 164, 165, 169, 172, 181, 185, 189, 192, 196, 204, 205, 216, 217, 220, 221, 224, 245, 257, 264, 269, 272, 277]