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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.

A229908 The least prime that has at least n embedded primes, reading forward and backward.

Table of values

n a(n)
1 2
2 13
3 13
4 37
5 113
6 113
7 137
8 1237
9 1373
10 1733
11 1733
12 11317
13 11731
14 12713
15 19973
16 91733
17 113173
18 113371
19 113371
20 173347
21 991733
22 1123379
23 1134673
24 1137991
25 1237199
26 2333719
27 7433719
28 11133719
29 11399173
30 11399173
31 11791733
32 37914713
33 97433719
34 113217397
35 113217397
36 113337199
37 113337199
38 113337199
39 1113371999
40 1113371999
41 1113991733
42 1139917321
43 1139917321
44 1139917333

List of values

[2, 13, 13, 37, 113, 113, 137, 1237, 1373, 1733, 1733, 11317, 11731, 12713, 19973, 91733, 113173, 113371, 113371, 173347, 991733, 1123379, 1134673, 1137991, 1237199, 2333719, 7433719, 11133719, 11399173, 11399173, 11791733, 37914713, 97433719, 113217397, 113217397, 113337199, 113337199, 113337199, 1113371999, 1113371999, 1113991733, 1139917321, 1139917321, 1139917333]

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

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