%I #15 Jun 26 2021 06:46:35
%S 0,1,2,3,4,5,6,8,10,11,12,13,14,15,16,17,19,21,22,23,24,25,26,27,28,
%T 30,32,33,34,35,36,37,38,39,41,43,44,45,46,47,48,49,50,52,54,55,56,57,
%U 58,59,60,61,63,65,66,67,68,69,70,71,72,74,76,86,88,89,90,91,92,93
%N Numbers whose base-11 representation has the same number of 7's and 9's.
%t Select[Range[0,100],DigitCount[#,11,7]==DigitCount[#,11,9]&] (* _Harvey P. Dale_, Jul 04 2011 *)
%K nonn,base,easy
%O 1,3
%A _Olivier GĂ©rard_
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