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.

A056693 Numbers k such that 70*R_k + 9 is prime, where R_k = 11...1 is the repunit (A002275) of length k.

Table of values

n a(n)
1 1
2 65
3 85
4 89
5 101
6 385
7 623
8 7783
9 18535
10 113756
11 135878

List of values

[1, 65, 85, 89, 101, 385, 623, 7783, 18535, 113756, 135878]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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