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 A086370 #4 May 11 2007 03:00:00 %S A086370 1,1,2,4,5,6,6,7,8,9,8,9,10,11,12,23,24,25,26,27,28,24,25,26,27,28,29 %N A086370 Duplicate of A083788. %K A086370 dead %O A086370 1,3