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%I #11 Jun 27 2021 10:45:32
%S 0,1,2,3,4,5,6,7,8,11,12,13,14,15,16,17,18,19,20,23,24,25,26,27,28,29,
%T 30,31,32,35,36,37,38,39,40,41,42,43,44,47,48,49,50,51,52,53,54,55,56,
%U 59,60,61,62,63,64,65,66,67,68,71,72,73,74,75,76,77,78,79,80,83
%N Numbers whose base-12 representation has the same number of 9's and 10's.
%t Select[Range[0,100],DigitCount[#,12,9]==DigitCount[#,12,10]&] (* _Harvey P. Dale_, Oct 21 2013 *)
%K nonn,base,easy
%O 1,3
%A _Olivier Gérard_