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.

A182253 Nonprime numbers n such that n^2 + n + 1 is prime.

Table of values

n a(n)
1 1
2 6
3 8
4 12
5 14
6 15
7 20
8 21
9 24
10 27
11 33
12 38
13 50
14 54
15 57
16 62
17 66
18 69
19 75
20 77
21 78
22 80
23 90
24 99
25 105
26 110
27 111
28 117
29 119
30 138
31 141
32 143
33 147
34 150
35 153
36 155
37 161
38 162
39 164
40 168
41 176
42 188
43 189
44 192
45 194
46 203
47 206
48 209
49 215
50 218
51 231
52 236
53 245
54 246
55 266
56 272
57 278

List of values

[1, 6, 8, 12, 14, 15, 20, 21, 24, 27, 33, 38, 50, 54, 57, 62, 66, 69, 75, 77, 78, 80, 90, 99, 105, 110, 111, 117, 119, 138, 141, 143, 147, 150, 153, 155, 161, 162, 164, 168, 176, 188, 189, 192, 194, 203, 206, 209, 215, 218, 231, 236, 245, 246, 266, 272, 278]