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 A026873 #4 Mar 30 2012 18:56:11 %S A026873 1,6,29,131,576,2505,10857,47081,204724,893766,3920310,17283214, %T A026873 76596745,341264480,1528405584,6880122182,31123426923,141456560459, %U A026873 645811464667,2960966353657,13630215685869,62981140857061,292049203818249 %N A026873 T(2n,n+2), T given by A026758. %K A026873 nonn %O A026873 2,2 %A A026873 _Clark Kimberling_