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Numbers n such that string 4,5 occurs in the base 9 representation of n but not of n+1.
1

%I #5 Mar 30 2012 18:56:46

%S 41,122,203,284,365,377,446,527,608,689,770,851,932,1013,1094,1106,

%T 1175,1256,1337,1418,1499,1580,1661,1742,1823,1835,1904,1985,2066,

%U 2147,2228,2309,2390,2471,2552,2564,2633,2714,2795

%N Numbers n such that string 4,5 occurs in the base 9 representation of n but not of n+1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_