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Numbers whose base-11 representation has the same nonzero number of 6's and 9's.
0

%I #12 Jun 30 2021 04:33:03

%S 75,105,196,226,317,347,438,468,559,589,680,710,735,746,757,768,779,

%T 790,812,823,825,826,827,828,829,830,832,833,835,845,922,952,1043,

%U 1073,1095,1106,1117,1128,1139,1150,1155,1156,1157,1158,1159,1160

%N Numbers whose base-11 representation has the same nonzero number of 6's and 9's.

%t Select[Range[1200],DigitCount[#,11,6]==DigitCount[#,11,9]>0&] (* _Harvey P. Dale_, Jan 31 2015 *)

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_