%I

%S 9,45,54,81,117,153,189,225,261,270,297,324,369,405,441,477,486,513,

%T 549,585,621,657,693,702,729,765,801,837,873,909,918,945,981,1017,

%U 1053,1089,1125,1134,1161,1197,1233,1269,1305,1341,1350

%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_