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 A026096 #4 Mar 30 2012 18:56:04
%S A026096 2,4,8,15,42,127,376,1122,3344,9980,29796,89007,265986,795147,2377744,
%T A026096 7112065,21277698,63670773,190560180,570416805,1707707142,5113158165,
%U A026096 15311384784,45854766744,137339426436,411379964442,1232324471060
%N A026096 Sum{T(n,k)}, k = 0,1,...,n, where T is the array defined in A026082.
%Y A026096 For n>2, first differences of A026080.
%K A026096 nonn
%O A026096 0,1
%A A026096 _Clark Kimberling_