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.

A278053 Primes p such that sigma(2^(p+1)) is prime.

Table of values

n a(n)
1 3
2 5
3 11
4 17
5 29
6 59
7 1277
8 4421
9 110501
10 132047
11 20996009
12 24036581

List of values

[3, 5, 11, 17, 29, 59, 1277, 4421, 110501, 132047, 20996009, 24036581]