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 A043331 #5 May 11 2007 03:00:00 %S A043331 26,53,62,71,74,77,78,79,107,134,143,152,155,158,159,160,170 %N A043331 Duplicate of A023701. %K A043331 dead %O A043331 1,1