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.

A056689 Numbers k such that 70*R_k + 3, where R_k = 11...1 is the repunit (A002275) of length k.

Table of values

n a(n)
1 0
2 1
3 2
4 4
5 8
6 11
7 14
8 20
9 263
10 382
11 2719
12 4493
13 21166
14 45824
15 55850
16 64567
17 70726

List of values

[0, 1, 2, 4, 8, 11, 14, 20, 263, 382, 2719, 4493, 21166, 45824, 55850, 64567, 70726]