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 A026075 #5 Jun 23 2013 10:15:39 %S A026075 1,2,23,230,2395,25518,276298,3026790,33452225,372278104,4165976594, %T A026075 46831604742,528454140310,5982318103300,67908970800315, %U A026075 772718361911646,8810943692302959,100652401936330376,1151695085791305180,13197378357577994370 %N A026075 a(n) = T(4n,n), where T is the array defined in A024996. %K A026075 nonn %O A026075 0,2 %A A026075 _Clark Kimberling_