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 A043325 #6 May 11 2007 03:00:00 %S A043325 1,3,5,7,9,11,15,17,19,21,23,25,27,29,33,35,45,47,51,53,55,57 %N A043325 Duplicate of A023692. %K A043325 dead %O A043325 1,2