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.

A250288 Numbers n such that the duodecimal repunit (12^n - 1)/11 is a semiprime.

Table of values

n a(n)
1 7
2 13
3 17
4 37
5 47
6 73
7 101
8 131
9 151
10 167
11 197
12 241
13 263

List of values

[7, 13, 17, 37, 47, 73, 101, 131, 151, 167, 197, 241, 263]