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Numbers whose base-11 representation has the same nonzero number of 1's and 5's.
0

%I #14 Jun 30 2021 04:30:59

%S 16,56,126,148,159,170,176,178,179,180,182,183,184,185,186,192,203,

%T 214,225,236,258,298,379,419,500,540,606,616,618,619,620,622,623,624,

%U 625,626,628,639,650,672,683,694,705,716,742,782,863,903,984,1024

%N Numbers whose base-11 representation has the same nonzero number of 1's and 5's.

%t Select[Range[1200],DigitCount[#,11,1]== DigitCount[#,11,5] >0&] (* _Harvey P. Dale_, Apr 17 2011 *)

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_