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 A142726 #2 Mar 31 2012 10:22:09
%S A142726 5,43,2850,9380555,131539825706327,25568462906010064277774504354,
%T A142726 1702783284378767791750994476557209698496292570221862357616,
%U A142726 9282809298390896944529722953873240985108041182275536393531898614770319137100914187360035180181565645720539192811580
%N A142726 Denominators of an Egyptian fraction for 1/Sqrt[20] = 0.2236067977...
%t A142726 a = {}; k = N[1/Sqrt[20], 1000]; Do[s = Ceiling[1/k]; AppendTo[a, s]; k = k - 1/s, {n, 1, 10}]; a (*Artur Jasinski*)
%Y A142726 A069139, A006487, A006526, A006525, A006524, A001466, A110820, A117116, A118323, A118324, A118325, A144835, A132480-A132574, A069261, A144984-A145003
%K A142726 frac,nonn
%O A142726 1,1
%A A142726 _Artur Jasinski_, Sep 28 2008