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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.

A258084 Numbers n such that n concatenated with its reversal n' yields a prime when the rightmost digit of n and leftmost digit of n' are coalesced.

Table of values

n a(n)
1 2
2 3
3 5
4 7
5 10
6 13
7 15
8 18
9 19
10 31
11 35
12 37
13 38
14 72
15 75
16 78
17 79
18 91
19 92
20 100
21 103
22 105
23 106
24 113
25 114
26 124
27 127
28 128
29 133
30 138
31 139
32 143
33 147
34 154
35 155
36 163
37 165
38 166
39 174
40 179
41 181
42 184
43 193
44 198
45 199
46 301
47 302
48 304
49 307
50 308
51 315
52 323
53 324
54 335
55 345
56 348
57 351

List of values

[2, 3, 5, 7, 10, 13, 15, 18, 19, 31, 35, 37, 38, 72, 75, 78, 79, 91, 92, 100, 103, 105, 106, 113, 114, 124, 127, 128, 133, 138, 139, 143, 147, 154, 155, 163, 165, 166, 174, 179, 181, 184, 193, 198, 199, 301, 302, 304, 307, 308, 315, 323, 324, 335, 345, 348, 351]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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