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.

A242221 Numbers n such that n - n^2/m^2 and 2n - n/m are not prime for all m.

Table of values

n a(n)
1 1
2 25
3 26
4 28
5 33
6 35
7 39
8 46
9 50
10 58
11 63
12 65
13 77
14 78
15 81
16 85
17 86
18 88
19 92
20 93
21 94
22 95
23 105
24 111
25 116
26 118
27 119
28 122
29 123
30 124
31 125
32 130
33 133
34 134
35 143
36 144
37 145
38 146
39 148
40 153
41 155
42 160
43 161
44 162
45 165
46 170
47 171
48 172
49 176
50 178
51 183
52 185
53 186
54 188
55 189
56 196
57 202

List of values

[1, 25, 26, 28, 33, 35, 39, 46, 50, 58, 63, 65, 77, 78, 81, 85, 86, 88, 92, 93, 94, 95, 105, 111, 116, 118, 119, 122, 123, 124, 125, 130, 133, 134, 143, 144, 145, 146, 148, 153, 155, 160, 161, 162, 165, 170, 171, 172, 176, 178, 183, 185, 186, 188, 189, 196, 202]