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Numbers whose base-11 representation has the same number of 3's and 4's.
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%I #11 Jun 26 2021 06:47:41

%S 0,1,2,5,6,7,8,9,10,11,12,13,16,17,18,19,20,21,22,23,24,27,28,29,30,

%T 31,32,37,47,55,56,57,60,61,62,63,64,65,66,67,68,71,72,73,74,75,76,77,

%U 78,79,82,83,84,85,86,87,88,89,90,93,94,95,96,97,98,99,100,101,104

%N Numbers whose base-11 representation has the same number of 3's and 4's.

%t Select[Range[0,200],DigitCount[#,11,3]==DigitCount[#,11,4]&] (* _Harvey P. Dale_, Jun 26 2013 *)

%K nonn,base,easy

%O 1,3

%A _Olivier GĂ©rard_