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.

A105403 Numbers n such that prime(n)-1 and prime(n+1)-1 have the same largest prime factor.

Table of values

n a(n)
1 2
2 30
3 53
4 217

List of values

[2, 30, 53, 217]