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Numbers whose base-10 representation has the same nonzero number of 0's and 9's.
0

%I #13 Jun 30 2021 03:54:51

%S 90,109,190,209,290,309,390,409,490,509,590,609,690,709,790,809,890,

%T 901,902,903,904,905,906,907,908,910,920,930,940,950,960,970,980,1019,

%U 1029,1039,1049,1059,1069,1079,1089,1091,1092,1093,1094,1095,1096

%N Numbers whose base-10 representation has the same nonzero number of 0's and 9's.

%t Select[Range[1200],DigitCount[#,10,0]==DigitCount[#,10,9]>0&] (* _Harvey P. Dale_, May 06 2021 *)

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_