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.

A118505 Sophie Germain primes for which the product of the digits is also a Sophie Germain prime.

Table of values

n a(n)
1 2
2 3
3 5
4 113
5 131
6 1511
7 111111113
8 1111111121
9 1111111111111111111111111111111121
10 111111111111111111111111111111111111131
11 111111111113111111111111111111111111111
12 111111131111111111111111111111111111111111111111111111111

List of values

[2, 3, 5, 113, 131, 1511, 111111113, 1111111121, 1111111111111111111111111111111121, 111111111111111111111111111111111111131, 111111111113111111111111111111111111111, 111111131111111111111111111111111111111111111111111111111]

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

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