%I #5 Mar 30 2012 18:56:44

%S 75,175,275,375,475,575,675,750,775,875,975,1075,1175,1275,1375,1475,

%T 1575,1675,1750,1775,1875,1975,2075,2175,2275,2375,2475,2575,2675,

%U 2750,2775,2875,2975,3075,3175,3275,3375,3475,3575

%N Numbers n such that string 7,5 occurs in the base 10 representation of n but not of n-1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_