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 A026073 #4 Mar 30 2012 18:56:04 %S A026073 1,2,5,24,133,736,4135,23452,134043,770864,4455462,25859380,150615223, %T A026073 879876040,5153445895,30251941860,177938418225,1048452751872, %U A026073 6187400646130,36566048896896,216370786646054 %N A026073 T(2n,n), where T is the array defined in A024996. %Y A026073 Bisection of A026078. %K A026073 nonn %O A026073 0,2 %A A026073 _Clark Kimberling_