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 A047008 #4 Mar 30 2012 18:56:51 %S A047008 1,4,14,50,180,658,2429,9052,33975,128320,487124,1857362,7108400, %T A047008 27293280,105090130,405643176,1569193041,6082113750,23615073305, %U A047008 91834287660,357631419474,1394521107804,5444070076494,21275915138100 %N A047008 T(n,n+3), array T given by A047000. %K A047008 nonn %O A047008 0,2 %A A047008 _Clark Kimberling_