%I #5 Mar 30 2012 18:56:46

%S 50,150,250,350,450,509,550,650,750,850,950,1050,1150,1250,1350,1450,

%T 1509,1550,1650,1750,1850,1950,2050,2150,2250,2350,2450,2509,2550,

%U 2650,2750,2850,2950,3050,3150,3250,3350,3450,3509

%N Numbers n such that string 5,0 occurs in the base 10 representation of n but not of n+1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_