%I #15 Jan 10 2025 10:15:04
%S 21,57,93,111,117,123,126,127,128,130,131,135,141,165,201,237,273,309,
%T 327,333,339,342,343,344,346,347,351,357,381,417,453,489,525,543,549,
%U 555,558,559,560,562,563,567,573,597,633,651
%N Numbers having two 3's in base 6.
%H Harvey P. Dale, <a href="/A043382/b043382.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Range[700],DigitCount[#,6,3]==2&] (* _Harvey P. Dale_, Jan 10 2025 *)
%Y Cf. A007092.
%K nonn,base
%O 1,1
%A _Clark Kimberling_