A039456 - OEIS

%I #13 Jun 30 2021 04:30:42

%S 21,111,131,153,164,175,186,197,208,219,230,231,233,234,235,236,237,

%T 238,239,240,263,353,384,474,505,595,626,716,747,837,868,958,989,1079,

%U 1110,1200,1211,1221,1223,1224,1225,1226,1227,1228,1229,1230,1233

%N Numbers whose base-11 representation has the same nonzero number of 1's and 10's.

%t Select[Range[1500],DigitCount[#,11,1]==DigitCount[#,11,10]>0&] (* _Harvey P. Dale_, Dec 13 2013 *)

%K nonn,base,easy

%O 1,1

%A _Olivier Gérard_