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.
%I A103350 #12 Jan 17 2015 23:15:47
%S A103350 1,256,1679616,429981696,167961600000000,167961600000000,
%T A103350 968265199641600000000,247875891108249600000000,
%U A103350 1626313721561225625600000000,1626313721561225625600000000
%N A103350 Denominators of sum_{k=1..n} 1/k^8 = Zeta(8,n).
%C A103350 For the numerators, comments and a link reference see A103349.
%t A103350 s=0;lst={};Do[s+=n^1/n^9;AppendTo[lst,Denominator[s]],{n,3*4!}];lst (* _Vladimir Joseph Stephan Orlovsky_, Jan 24 2009 *)
%t A103350 Table[ HarmonicNumber[n, 8] // Denominator, {n, 1, 10}] (* _Jean-François Alcover_, Dec 04 2013 *)
%K A103350 nonn,frac,easy
%O A103350 1,2
%A A103350 _Wolfdieter Lang_, Feb 15 2005