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.

A099410 Numbers k such that 2*R_k + 7 is prime, where R_k = 11...1 is the repunit (A002275) of length k.

Table of values

n a(n)
1 0
2 2
3 3
4 5
5 14
6 176
7 416
8 2505
9 2759
10 7925
11 9401
12 10391
13 12105
14 19616
15 261704
16 264539

List of values

[0, 2, 3, 5, 14, 176, 416, 2505, 2759, 7925, 9401, 10391, 12105, 19616, 261704, 264539]