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Numbers whose base-11 representation has the same number of 5's and 10's.
0

%I #11 Jun 26 2021 06:46:16

%S 0,1,2,3,4,6,7,8,9,11,12,13,14,15,17,18,19,20,22,23,24,25,26,28,29,30,

%T 31,33,34,35,36,37,39,40,41,42,44,45,46,47,48,50,51,52,53,65,66,67,68,

%U 69,70,72,73,74,75,77,78,79,80,81,83,84,85,86,88,89,90,91,92,94

%N Numbers whose base-11 representation has the same number of 5's and 10's.

%t Select[Range[0,100],DigitCount[#,11,5]==DigitCount[#,11,10]&] (* _Harvey P. Dale_, Oct 30 2013 *)

%K nonn,base,easy

%O 1,3

%A _Olivier GĂ©rard_