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Numbers n such that string 1,3 occurs in the base 6 representation of n but not of n+1.
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%I #5 Mar 30 2012 18:56:45

%S 9,45,59,81,117,153,189,225,261,275,297,359,369,405,441,477,491,513,

%T 549,585,621,657,693,707,729,765,801,837,873,909,923,945,981,1017,

%U 1053,1089,1125,1139,1161,1197,1233,1269,1305,1341,1355

%N Numbers n such that string 1,3 occurs in the base 6 representation of n but not of n+1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_