A039193 - OEIS

%I #12 Jun 26 2021 06:45:55

%S 0,1,2,3,5,6,7,8,10,11,12,13,14,16,17,18,19,21,22,23,24,25,27,28,29,

%T 30,32,33,34,35,36,38,39,40,41,43,53,55,56,57,58,60,61,62,63,65,66,67,

%U 68,69,71,72,73,74,76,77,78,79,80,82,83,84,85,87,88,89,90,91,93,94

%N Numbers whose base-11 representation has the same number of 4's and 9's.

%t Select[Range[0,100],DigitCount[#,11,4]==DigitCount[#,11,9]&] (* _Harvey P. Dale_, Jul 14 2011 *)

%K nonn,base,easy

%O 1,3

%A _Olivier Gérard_