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%I #15 Apr 23 2023 21:56:46
%S 24,73,122,150,157,164,168,169,170,172,173,174,178,185,192,220,269,
%T 318,367,416,465,493,500,507,511,512,513,515,516,517,521,528,535,563,
%U 612,661,710,759,808,836,843,850,854,855,856,858
%N Numbers whose base-7 representation contains exactly two 3's.
%t Select[Range[1000],DigitCount[#,7,3]==2&] (* _Harvey P. Dale_, Mar 28 2011 *)
%Y Cf. A007093.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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