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 A144991 #2 Mar 31 2012 10:22:10
%S A144991 4,37,3096,13574127,239733306553235,97513053185223980902949043420,
%T A144991 19969225922307588915237554701516633177873678175659426464707
%N A144991 Denominators of an Egyptian fraction for 1/Sqrt[13] = 0.277350098...
%t A144991 a = {}; k = N[1/Sqrt[13], 1000]; Do[s = Ceiling[1/k]; AppendTo[a, s]; k = k - 1/s, {n, 1, 10}]; a (*Artur Jasinski*)
%Y A144991 A069139, A006487, A006526, A006525, A006524, A001466, A110820, A117116, A118323, A118324, A118325, A144835, A132480-A132574, A069261, A144984-A145003
%K A144991 frac,nonn
%O A144991 1,1
%A A144991 _Artur Jasinski_, Sep 28 2008