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 A064339 #2 Mar 31 2012 13:20:06 %S A064339 1,2,3,3,5,12,50,289,2032,16384,147817,1471633,16002504,188441358, %T A064339 2385787007,32281229769,464479506181,7076959159858,113762276632726, %U A064339 1923164965554837,34092037061635649,632112131123669460 %N A064339 Row sums of unsigned triangle A064334. %Y A064339 A064338 (row sums of signed triangle A064334). %K A064339 nonn %O A064339 0,2 %A A064339 _Wolfdieter Lang_, Sep 21 2001