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Numbers whose base-11 representation has the same number of 5's and 8's.
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%I #11 Jun 26 2021 06:46:09

%S 0,1,2,3,4,6,7,9,10,11,12,13,14,15,17,18,20,21,22,23,24,25,26,28,29,

%T 31,32,33,34,35,36,37,39,40,42,43,44,45,46,47,48,50,51,53,54,63,66,67,

%U 68,69,70,72,73,75,76,77,78,79,80,81,83,84,86,87,93,99,100,101,102

%N Numbers whose base-11 representation has the same number of 5's and 8's.

%t Select[Range[0,150],DigitCount[#,11,5]==DigitCount[#,11,8]&] (* _Harvey P. Dale_, Dec 01 2015 *)

%K nonn,base,easy

%O 1,3

%A _Olivier GĂ©rard_