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.

A166503 Numbers k with property that k^2 is the concatenation of two or more prime numbers.

Table of values

n a(n)
1 5
2 15
3 17
4 19
5 23
6 27
7 49
8 51
9 53
10 69
11 73
12 77
13 85
14 87
15 107
16 109
17 115
18 123
19 141
20 147
21 151
22 153
23 157
24 159
25 163
26 165
27 171
28 173
29 177
30 181
31 187
32 191
33 199
34 219
35 229
36 231
37 233
38 235
39 239
40 241
41 243
42 267
43 269
44 277
45 279
46 281
47 289
48 299
49 319
50 327
51 331
52 335
53 337
54 343
55 357

List of values

[5, 15, 17, 19, 23, 27, 49, 51, 53, 69, 73, 77, 85, 87, 107, 109, 115, 123, 141, 147, 151, 153, 157, 159, 163, 165, 171, 173, 177, 181, 187, 191, 199, 219, 229, 231, 233, 235, 239, 241, 243, 267, 269, 277, 279, 281, 289, 299, 319, 327, 331, 335, 337, 343, 357]