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.

A256444 Numbers k such that sigma(k) = 2*(phi(k-1)+1).

Table of values

n a(n)
1 3
2 5
3 17
4 26
5 257
6 65537
7 10866583226

List of values

[3, 5, 17, 26, 257, 65537, 10866583226]