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 A113289 #3 Mar 30 2012 18:36:51 %S A113289 1,-1,4,-15,36,-119,302,-911,2440,-7199,20186,-60359,177204,-546615, %T A113289 1683286,-5401759,17456128,-58447151,197925490,-691264279,2446636396, %U A113289 -8897012871,32811147054,-123933345455,474792813176,-1858243857599,7375013350282,-29840434526951 %N A113289 Row sums of triangle A113288. %Y A113289 Cf. A113287, A113288, A113290. %K A113289 sign %O A113289 0,3 %A A113289 _Paul D. Hanna_, Oct 23 2005