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%I #15 Jun 25 2021 01:43:22
%S 2,3,4,5,6,7,8,9,20,21,22,23,24,25,26,29,30,31,32,33,34,35,38,39,40,
%T 41,42,43,44,47,48,49,50,51,52,53,56,57,58,59,60,61,62,65,66,67,68,69,
%U 70,71,74,75,76,77,78,79,80,83,84,85,86,87,88,89,99,108,117,126,135
%N Numbers whose base-9 representation has the same number of 0's and 1's.
%t Select[Range[150],DigitCount[#,9,0]==DigitCount[#,9,1]&] (* _Harvey P. Dale_, Dec 23 2011 *)
%Y Cf. A007095.
%K nonn,base,easy
%O 1,1
%A _Olivier Gérard_
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