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 A103348 #12 Jan 17 2015 23:15:02
%S A103348 1,128,279936,35831808,2799360000000,933120000000,768464444160000000,
%T A103348 98363448852480000000,645362587921121280000000,
%U A103348 645362587921121280000000,12576291107821424895098880000000,12576291107821424895098880000000
%N A103348 Denominators of sum_{k=1..n} 1/k^7 = Zeta(7,n).
%C A103348 For the numerators, comments and a link reference see A103347.
%t A103348 s=0;lst={};Do[s+=n^1/n^8;AppendTo[lst,Denominator[s]],{n,3*4!}];lst (* _Vladimir Joseph Stephan Orlovsky_, Jan 24 2009 *)
%t A103348 Table[ HarmonicNumber[n, 7] // Denominator, {n, 1, 12}] (* _Jean-François Alcover_, Dec 04 2013 *)
%K A103348 nonn,frac,easy
%O A103348 1,2
%A A103348 _Wolfdieter Lang_, Feb 15 2005