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 A134115 #5 Mar 30 2012 18:40:44 %S A134115 1,9,18,927,1656,94095,144135,9692874,12764034,984024783,1044876843, %T A134115 90695018313,184635924282,9238285681452,16945429767822, %U A134115 946490231198502,1481588810203581,96566699618177661,121999692536490051 %N A134115 Powers of 9 written backwards and sorted. %C A134115 Differs from the unsorted version A071587 near positions i=21, 43, 65 etc. where A071587(i+1) < A071587(i). - _R. J. Mathar_, Jun 08 2008 %K A134115 base,easy,nonn %O A134115 1,2 %A A134115 _Jonathan Vos Post_, Oct 08 2007