%I #5 Mar 30 2012 18:56:44
%S 64,164,264,364,464,564,640,664,764,864,964,1064,1164,1264,1364,1464,
%T 1564,1640,1664,1764,1864,1964,2064,2164,2264,2364,2464,2564,2640,
%U 2664,2764,2864,2964,3064,3164,3264,3364,3464,3564
%N Numbers n such that string 6,4 occurs in the base 10 representation of n but not of n-1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_