[seqfan] Numbers n such that n^4 divides Sum[ k^n, {k,1,n} ]

[José María Grau Ribas]

A121707 <http://oeis.org/A121707>

Numbers n such that n^3 divides Sum[ k^n, {k,1,n} ]


Let me an innocent question.

Do you think that the following set is empty?

Numbers n such that n^4 divides Sum[ k^n, {k,1,n} ]

 Yours sincerely <http://forum.wordreference.com/showthread.php?t=492915>
  José María Grau Ribas