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 A098544 #3 Mar 30 2012 18:36:43 %S A098544 1,2,3,7,23,119,1015,14583,359671,15471863,1175385335,159340049655, %T A098544 38896770036983,17236173561738487,13964145988355962103, %U A098544 20815799450275539268855,57414894532101339581199607 %N A098544 Row sums of triangle A098542, which shifts left and up under the matrix square. %Y A098544 Cf. A098542, A098543. %K A098544 nonn %O A098544 0,2 %A A098544 _Paul D. Hanna_, Sep 16 2004