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.

A240768 Left-truncatable primes p with property that prepending any single decimal digit to p does not produce a prime.

Table of values

n a(n)
1 2
2 5
3 773
4 3373
5 3947
6 4643
7 5113
8 6397
9 6967
10 7937
11 15647
12 16823
13 24373
14 33547
15 34337
16 37643
17 56983
18 57853
19 59743
20 62383
21 63347
22 63617
23 69337
24 72467
25 72617
26 75653
27 76367
28 87643
29 92683
30 97883
31 98317
32 121997
33 124337
34 163853
35 213613
36 236653
37 242467
38 242797

List of values

[2, 5, 773, 3373, 3947, 4643, 5113, 6397, 6967, 7937, 15647, 16823, 24373, 33547, 34337, 37643, 56983, 57853, 59743, 62383, 63347, 63617, 69337, 72467, 72617, 75653, 76367, 87643, 92683, 97883, 98317, 121997, 124337, 163853, 213613, 236653, 242467, 242797]