%I A044421
%S A044421 89,189,289,389,489,589,689,789,889,989,1089,1189,1289,1389,1489,
%T A044421 1589,1689,1789,1889,1989,2089,2189,2289,2389,2489,2589,2689,
%U A044421 2789,2889,2989,3089,3189,3289,3389,3489,3589,3689,3789,3889
%N A044421 Numbers n such that string 8,9 occurs in the base 10 representation of 
               n but not of n-1.
%H A044421 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/
               NonRecursions.html">Non Recursions</a>
%Y A044421 Sequence in context: A106758 A142335 A033670 this_sequence A044802 A142499 
               A141953
%Y A044421 Adjacent sequences: A044418 A044419 A044420 this_sequence A044422 A044423 
               A044424
%K A044421 nonn,base
%O A044421 1,1
%A A044421 Clark Kimberling (ck6(AT)evansville.edu)