%I A009995
%S A009995 0,1,2,3,4,5,6,7,8,9,10,20,21,30,31,32,40,41,42,43,50,51,52,53,54,60,61,
%T A009995 62,63,64,65,70,71,72,73,74,75,76,80,81,82,83,84,85,86,87,90,91,92,93,
%U A009995 94,95,96,97,98,210,310,320,321,410,420,421,430,431,432,510,520,521,530
%N A009995 Numbers with digits in strictly decreasing order.
%C A009995 There are precisely 1023 terms (corresponding to every nonempty subset 
               of {0..9}).
%H A009995 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               Digit.html">Link to a section of The World of Mathematics.</a>
%t A009995 Sort@ Flatten@ Table[FromDigits /@ Subsets[ Range[9, 0, -1], {n}], {n, 
               10}] (Zak Seidov (zakseidov(AT)yahoo.com), May 10 2006)
%Y A009995 Cf. A009993.
%Y A009995 Sequence in context: A089583 A032865 A032889 this_sequence A038367 A161350 
               A108652
%Y A009995 Adjacent sequences: A009992 A009993 A009994 this_sequence A009996 A009997 
               A009998
%K A009995 nonn,fini,base
%O A009995 0,3
%A A009995 N. J. A. Sloane (njas(AT)research.att.com).