%I #13 Jun 30 2021 03:54:39
%S 15,51,105,125,135,145,150,152,153,154,156,157,158,159,165,175,185,
%T 195,215,251,315,351,415,451,501,510,512,513,514,516,517,518,519,521,
%U 531,541,561,571,581,591,615,651,715,751,815,851,915,951,1005,1025
%N Numbers whose base-10 representation has the same nonzero number of 1's and 5's.
%t Select[Range[1100],DigitCount[#,10,1]==DigitCount[#,10,5]>0&] (* _Harvey P. Dale_, Nov 26 2020 *)
%K nonn,base,easy
%O 1,1
%A _Olivier Gérard_