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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.

A034812 Concatenation of 'prevprime(k) and k and prevprime(k)' is a prime.

Table of values

n a(n)
1 5
2 8
3 9
4 12
5 14
6 17
7 19
8 23
9 25
10 28
11 31
12 33
13 38
14 39
15 41
16 42
17 47
18 48
19 51
20 60
21 61
22 62
23 63
24 69
25 71
26 72
27 75
28 77
29 78
30 80
31 81
32 84
33 85
34 91
35 102
36 104
37 105
38 111
39 124
40 126
41 149
42 150
43 167
44 181
45 182
46 189
47 192
48 194
49 215
50 222
51 227
52 230
53 233
54 242
55 243
56 256
57 271
58 273
59 283
60 288
61 308

List of values

[5, 8, 9, 12, 14, 17, 19, 23, 25, 28, 31, 33, 38, 39, 41, 42, 47, 48, 51, 60, 61, 62, 63, 69, 71, 72, 75, 77, 78, 80, 81, 84, 85, 91, 102, 104, 105, 111, 124, 126, 149, 150, 167, 181, 182, 189, 192, 194, 215, 222, 227, 230, 233, 242, 243, 256, 271, 273, 283, 288, 308]

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

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