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%I #14 Apr 23 2023 22:01:26
%S 2400,4801,7202,9603,12004,14405,14748,15091,15434,15777,16120,16463,
%T 16512,16561,16610,16659,16708,16757,16764,16771,16778,16785,16792,
%U 16799,16800,16801,16802,16803,16804,16805,19207
%N Numbers whose base-7 representation contains exactly four 6's.
%H Harvey P. Dale, <a href="/A043420/b043420.txt">Table of n, a(n) for n = 1..2500</a>
%t Select[Range[20000],DigitCount[#,7,6]==4&] (* _Harvey P. Dale_, Mar 27 2017 *)
%Y Cf. A007093.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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