%I

%S 0,1,2,5,6,7,8,9,10,11,14,15,16,17,18,19,20,23,24,25,26,31,39,45,46,

%T 47,50,51,52,53,54,55,56,59,60,61,62,63,64,65,68,69,70,71,72,73,74,77,

%U 78,79,80,81,82,83,86,87,88,89,90,91,92,95,96,97,98,99,100,101,104

%N Numbers n such that representation in base 9 has same number of 3's and 4's.

%K nonn,base,easy

%O 1,3

%A _Olivier GĂ©rard_