%I #12 Jun 30 2021 04:32:05

%S 49,59,170,180,291,301,412,422,489,500,511,522,539,540,541,542,545,

%T 546,547,548,549,555,566,577,588,599,609,620,631,642,649,650,651,652,

%U 655,656,657,658,659,675,686,697,708,719,775,785,896,906,1017,1027

%N Numbers whose base-11 representation has the same nonzero number of 4's and 5's.

%t Select[Range[1100],DigitCount[#,11,4]==DigitCount[#,11,5]>0&] (* _Harvey P. Dale_, May 10 2014 *)

%K nonn,base,easy

%O 1,1

%A _Olivier Gérard_