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.

A212129 Numbers n such that 10^(2n+1) + 21*10^n + 1 is prime.

Table of values

n a(n)
1 2
2 3
3 11
4 12
5 15
6 42
7 311
8 314
9 579
10 1943
11 2262
12 5199
13 7329
14 12792

List of values

[2, 3, 11, 12, 15, 42, 311, 314, 579, 1943, 2262, 5199, 7329, 12792]