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 A144989 #2 Mar 31 2012 10:22:10
%S A144989 4,20,662,1297759,1844432493162,5639188476912002976180302,
%T A144989 82026153762914421289030509892448816950653744800250,
%U A144989 41282640425840814517611601419413673319625465033274597914250689256152252919560334025322141823942800904
%N A144989 Denominators of an Egyptian fraction for 1/Sqrt[11] = 0.301511344577763622646812...
%t A144989 a = {}; k = N[1/Sqrt[11], 1000]; Do[s = Ceiling[1/k]; AppendTo[a, s]; k = k - 1/s, {n, 1, 10}]; a (*Artur Jasinski*)
%Y A144989 A069139, A006487, A006526, A006525, A006524, A001466, A110820, A117116, A118323, A118324, A118325, A144835, A132480-A132574, A069261, A144984-A145003
%K A144989 frac,nonn
%O A144989 1,1
%A A144989 _Artur Jasinski_, Sep 28 2008