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.

A270414 Numbers m such that sigma(m-1) and sigma(phi(m)) are both primes.

Table of values

n a(n)
1 3
2 5
3 10
4 17
5 65537

List of values

[3, 5, 10, 17, 65537]