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%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_
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