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.

A081317 Primes p such that p divides 10^n-1, p is the largest prime producing decimal fraction period n and p is not the largest prime dividing 10^n-1.

Table of values

n a(n)
1 13
2 52579
3 8779
4 2161
5 69857
6 909090909090909091
7 459691
8 549797184491917
9 14175966169
10 183411838171
11 296557347313446299
12 388847808493
13 3404193829806058997303
14 8985695684401
15 297262705009139006771611927

List of values

[13, 52579, 8779, 2161, 69857, 909090909090909091, 459691, 549797184491917, 14175966169, 183411838171, 296557347313446299, 388847808493, 3404193829806058997303, 8985695684401, 297262705009139006771611927]

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

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