%I #5 Mar 30 2012 18:56:41

%S 9,18,27,36,45,54,63,72,81,99,108,117,126,135,144,153,162,180,189,198,

%T 207,216,225,234,243,279,288,297,306,315,324,342,351,360,369,378,387,

%U 396,405,423,432,441,450,459,468,477,486,522

%N Numbers n such that string 0,0 occurs in the base 3 representation of n but not of n-1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_