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 A026304 #4 Mar 30 2012 18:56:06 %S A026304 1,4,35,340,3484,36784,395922,4319172,47588100,528328108,5901043161, %T A026304 66233871972,746434573208 %N A026304 a(n) = T(4n,n), where T is the array in A026300. %K A026304 nonn %O A026304 0,2 %A A026304 _Clark Kimberling_