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.

A125664 Numbers such that the right half of the digits form a prime and the left half do not.

Table of values

n a(n)
1 12
2 13
3 15
4 17
5 42
6 43
7 45
8 47
9 62
10 63
11 65
12 67
13 82
14 83
15 85
16 87
17 92
18 93
19 95
20 97
21 102
22 103
23 105
24 107
25 112
26 113
27 115
28 117
29 122
30 123
31 125
32 127
33 132
34 133
35 135
36 137
37 142
38 143
39 145
40 147
41 152
42 153
43 155
44 157
45 162
46 163
47 165
48 167
49 172
50 173
51 175
52 177
53 182
54 183
55 185
56 187

List of values

[12, 13, 15, 17, 42, 43, 45, 47, 62, 63, 65, 67, 82, 83, 85, 87, 92, 93, 95, 97, 102, 103, 105, 107, 112, 113, 115, 117, 122, 123, 125, 127, 132, 133, 135, 137, 142, 143, 145, 147, 152, 153, 155, 157, 162, 163, 165, 167, 172, 173, 175, 177, 182, 183, 185, 187]