%I #5 Mar 30 2012 18:56:43
%S 44,144,244,344,440,544,644,744,844,944,1044,1144,1244,1344,1440,1544,
%T 1644,1744,1844,1944,2044,2144,2244,2344,2440,2544,2644,2744,2844,
%U 2944,3044,3144,3244,3344,3440,3544,3644,3744,3844
%N Numbers n such that string 4,4 occurs in the base 10 representation of n but not of n-1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_