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.

A080121 a(n) is the smallest k > 0 such that n^2^k + (n+1)^2^k is prime, or -1 if no such k exists.

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 1
6 2
7 1
8 2
9 1
10 5

List of values

[1, 1, 2, 1, 1, 2, 1, 2, 1, 5]