%I

%S 53,153,253,353,453,539,553,653,753,853,953,1053,1153,1253,1353,1453,

%T 1539,1553,1653,1753,1853,1953,2053,2153,2253,2353,2453,2539,2553,

%U 2653,2753,2853,2953,3053,3153,3253,3353,3453,3539

%N Numbers n such that string 5,3 occurs in the base 10 representation of n but not of n+1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_