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 A112004 #4 Sep 26 2012 04:26:20 %S A112004 90,-8028,459855,-22166430,991865875,-43155112000,1871623083330, %T A112004 -82074799907100,3670430981817600,-168269191527937500, %U A112004 7933301574849275625,-385378337023784354250,19309132829440209380625,-998382450032876448540000,53277504029278691474812500 %N A112004 One eighth of sixth column (k=5) of triangle A111999. %F A112004 a(n)=A111999(n+6, 5)/8, n>=0. %K A112004 sign,easy %O A112004 0,1 %A A112004 _Wolfdieter Lang_, Sep 12 2005