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 A026652 #4 Mar 30 2012 18:56:09 %S A026652 1,4,14,57,222,928,3764,15971,66190,283464,1190628,5131002,21749532, %T A026652 94153056,401757672,1745117091,7484144598,32595240952,140342565620, %U A026652 612526487822,2645723309284,11567425911936,50095161350616,219340900447118 %N A026652 a(n) = T(2n-1,n-1), T given by A026648. %K A026652 nonn %O A026652 1,2 %A A026652 _Clark Kimberling_