%I #15 Jun 20 2021 16:06:58

%S 0,1,2,3,4,7,8,9,10,11,14,15,16,17,18,21,22,23,24,25,28,29,30,31,32,

%T 41,47,49,50,51,52,53,56,57,58,59,60,63,64,65,66,67,70,71,72,73,74,77,

%U 78,79,80,81,90,96,98,99,100,101,102,105,106,107,108,109,112,113,114

%N Numbers whose base-7 representation has the same number of 5's and 6's.

%t Select[Range[0,200],DigitCount[#,7,5]==DigitCount[#,7,6]&] (* _Harvey P. Dale_, Aug 21 2016 *)

%K nonn,base,easy

%O 1,3

%A _Olivier Gérard_