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 A071360 #3 Mar 30 2012 17:36:38 %S A071360 2,31,421,5431,75431,764321,8764321,97654321 %N A071360 Smallest n-digit prime with strictly decreasing digits. %Y A071360 Cf. A071361, A071362, A071363, A007809. %K A071360 base,fini,full,nonn %O A071360 1,1 %A A071360 _Rick L. Shepherd_, May 21 2002