%I #10 Apr 24 2021 20:46:41
%S 3,12,21,27,28,29,31,32,33,34,35,39,48,57,66,75,84,93,102,108,109,110,
%T 112,113,114,115,116,120,129,138,147,156,165,174,183,189,190,191,193,
%U 194,195,196,197,201,210,219,228,237,243,244
%N Numbers having one 3 in base 9.
%t Select[Range[300],DigitCount[#,9,3]==1&] (* _Harvey P. Dale_, Nov 15 2014 *)
%Y Cf. A007095.
%K nonn,base
%O 1,1
%A _Clark Kimberling_