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Numbers n such that string 5,3 occurs in the base 6 representation of n but not of n-1.
1

%I #5 Mar 30 2012 18:56:42

%S 33,69,105,141,177,198,213,249,285,321,357,393,414,429,465,501,537,

%T 573,609,630,645,681,717,753,789,825,846,861,897,933,969,1005,1041,

%U 1062,1077,1113,1149,1185,1188,1257,1278,1293,1329

%N Numbers n such that string 5,3 occurs in the base 6 representation of n but not of n-1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_