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.

A090526 Primes arising in A090525, or 0 if A090525(n) = 0.

Original entry on oeis.org

2, 13, 23, 347, 4241, 41177, 1677721, 9224297, 769230769, 17831979413, 156422814881, 43267872370321, 317485909301657, 10680338789777057, 348051774975651917, 23635436053895336119, 230095953656704898101
Offset: 2

Views

Author

Amarnath Murthy, Dec 07 2003

Keywords

Comments

Conjecture: No term is zero.
Conjecture is true: see A090525. - Robert Israel, Mar 02 2023

Crossrefs

Programs

  • Maple
    f:= proc(n) local t,k,s;
      t:= n^n;
      for k from 2 do s:= floor(t/k); if isprime(s) then return s fi od
    end proc:
    map(f, [$2..100]); # Robert Israel, Mar 02 2023
  • Mathematica
    Do[p = n^n; i = 2; While[ !PrimeQ[Floor[p/i]], i++ ]; Print[Floor[p/i]], {n, 2, 30}] (* Ryan Propper, Aug 02 2005 *)

Formula

a(n) = floor(n^n/A090525(n)). - Robert Israel, Mar 02 2023

Extensions

More terms from Ryan Propper, Aug 02 2005
Offset corrected by Robert Israel, Mar 02 2023