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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.

A238056 Primes which are the concatenation of two primes in exactly one way.

Table of values

n a(n)
1 23
2 37
3 53
4 73
5 113
6 137
7 173
8 193
9 197
10 211
11 223
12 229
13 233
14 241
15 271
16 283
17 293
18 311
19 331
20 337
21 347
22 353
23 359
24 367
25 379
26 383
27 389
28 397
29 433
30 523
31 541
32 547
33 571
34 593
35 613
36 617
37 673
38 677
39 719
40 733
41 743
42 761
43 773
44 977
45 1013
46 1033
47 1093
48 1097
49 1117
50 1123
51 1129

List of values

[23, 37, 53, 73, 113, 137, 173, 193, 197, 211, 223, 229, 233, 241, 271, 283, 293, 311, 331, 337, 347, 353, 359, 367, 379, 383, 389, 397, 433, 523, 541, 547, 571, 593, 613, 617, 673, 677, 719, 733, 743, 761, 773, 977, 1013, 1033, 1093, 1097, 1117, 1123, 1129]

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

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