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.

A263500 Smallest positive b such that for all k >= 1 the numbers n*b^k + 1 are composite and gcd(n+1, b-1) = 1, or 0 if n > 1 is of the form 2^m - 1.

Table of values

n a(n)
3 0
4 14
5 140324348
6 34
7 0
8 8
9 177744
10 32
11 14

List of values

[0, 14, 140324348, 34, 0, 8, 177744, 32, 14]