%I

%S 24,124,224,240,324,424,524,624,724,824,924,1024,1124,1224,1240,1324,

%T 1424,1524,1624,1724,1824,1924,2024,2124,2224,2240,2324,2400,2524,

%U 2624,2724,2824,2924,3024,3124,3224,3240,3324,3424

%N Numbers n such that string 2,4 occurs in the base 10 representation of n but not of n-1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_