%I #11 Jun 26 2021 06:45:48

%S 0,1,2,3,5,6,8,9,10,11,12,13,14,16,17,19,20,21,22,23,24,25,27,28,30,

%T 31,32,33,34,35,36,38,39,41,42,43,51,55,56,57,58,60,61,63,64,65,66,67,

%U 68,69,71,72,74,75,76,81,88,89,90,91,93,94,96,97,98,99,100,101,102

%N Numbers whose base-11 representation has the same number of 4's and 7's.

%t Select[Range[0,150],DigitCount[#,11,4]==DigitCount[#,11,7]&] (* _Harvey P. Dale_, Nov 13 2013 *)

%K nonn,base,easy

%O 1,3

%A _Olivier Gérard_