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.

A370848 Lesser of two consecutive primes such that the product of its digits is also prime and the sum of the digits of the other is composite.

Table of values

n a(n)
1 13
2 17
3 31
4 71
5 113
6 1151
7 11131
8 112111
9 113111
10 131111
11 1111211
12 1111711
13 11111117
14 11111171
15 71111111
16 115111111
17 1111111121
18 1111115111
19 1115111111
20 1117111111
21 1151111111
22 1711111111
23 11111111113
24 11113111111
25 31111111111
26 111113111111
27 111511111111
28 1111171111111

List of values

[13, 17, 31, 71, 113, 1151, 11131, 112111, 113111, 131111, 1111211, 1111711, 11111117, 11111171, 71111111, 115111111, 1111111121, 1111115111, 1115111111, 1117111111, 1151111111, 1711111111, 11111111113, 11113111111, 31111111111, 111113111111, 111511111111, 1111171111111]

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

Content is available under The OEIS End-User License Agreement.