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 A119261 #2 Mar 30 2012 17:26:21
%S A119261 0,2,4,6,8,20,40,42,60,62,64,80,82,84,86,420,620,640,642,820,840,842,
%T A119261 860,862,864,6420,8420,8620,8640,8642,86420
%N A119261 Numbers with even decimal digits in decreasing order.
%C A119261 This is the complete list of all 31 such numbers. Cf. A119260 Even decimal digits in increasing order, A119253 Odd digits in increasing order, A119252 Odd digits in decreasing order, A009993 Digits in increasing order, A009995 Digits in decreasing order.
%t A119261 Sort@Flatten@Table[FromDigits/@Subsets[Range[8,0,-2],{n}],{n,5}]
%Y A119261 Cf. A009993, A009995, A119252, A119253, A119260.
%K A119261 base,fini,full,nonn
%O A119261 1,2
%A A119261 _Zak Seidov_, May 11 2006