%I A003587
%S A003587 1,5,10,50,100,500,1000,2,4,6,9,11,15,20,40,51,55,60,90,101,
%T A003587 105,110,150,200,400,501,505,510,550,600,900,1001,1005,1010,
%U A003587 1050,1100,1500,2000,3,7,12
%N A003587 Roman numerals with 1 letter, in numerical order; then those with 2 letters, 
               etc.
%Y A003587 Cf. A003588.
%Y A003587 Sequence in context: A035406 A103932 A034190 this_sequence A032088 A081076 
               A005438
%Y A003587 Adjacent sequences: A003584 A003585 A003586 this_sequence A003588 A003589 
               A003590
%K A003587 nonn,base
%O A003587 1,2
%A A003587 N. J. A. Sloane (njas(AT)research.att.com), J. H. Conway and John Jackson 
               (ab158(AT)freenet.uchsc.edu)