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%I #5 Mar 30 2012 18:56:47
%S 89,189,289,389,489,589,689,789,899,989,1089,1189,1289,1389,1489,1589,
%T 1689,1789,1899,1989,2089,2189,2289,2389,2489,2589,2689,2789,2899,
%U 2989,3089,3189,3289,3389,3489,3589,3689,3789,3899
%N Numbers n such that string 8,9 occurs in the base 10 representation of n but not of n+1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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