%I A001619
%S A001619 1,3,11,13,17,21,23,73,101,103,111,113,117,121,123,173,323,373,1101,
%T A001619 1103,1111,1113,1117,1121,1123,1173,1323,1373,3323,3373,11373,13373,
%U A001619 17373,21373,23373,73373,101373,103373,111373,113373,117373,121373
%N A001619 Number of letters in English name for n increases at these numbers.
%C A001619 "and" is used in number names and "-" is counted as a letter (e.g. "twenty-one" 
               has more letters than "seventeen").
%Y A001619 Sequence in context: A020635 A127209 A052362 this_sequence A071197 A052363 
               A045426
%Y A001619 Adjacent sequences: A001616 A001617 A001618 this_sequence A001620 A001621 
               A001622
%K A001619 word,nonn
%O A001619 1,2
%A A001619 N. J. A. Sloane (njas(AT)research.att.com).