%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_