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 A027071 #4 Mar 30 2012 18:56:13 %S A027071 1,1,2,4,9,23,59,153,406,1126,3124,8684,24202,67640,189576,532786, %T A027071 1519151,4356471,12501301,35901325,103188123,296844379,854701935, %U A027071 2463133311,7104685935,20510632575,59262772629,172271893036,502157965938 %N A027071 Greatest number in row n of array T given by A027052. %K A027071 nonn %O A027071 0,3 %A A027071 _Clark Kimberling_