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 A071039 #23 Aug 27 2020 15:30:54 %S A071039 1,1,1,1,1,1,1,0,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,0,1,1,1,1,0,1,1,1,0,1, %T A071039 1,1,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,1,1,0, %U A071039 1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1 %N A071039 Corrected version is duplicate of A118111. %K A071039 dead %O A071039 0,1 %A A071039 _Hans Havermann_, May 26 2002, corrected Jan 07 2012