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A043420 Numbers having four 6's in base 7. 1

%I

%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 having four 6's in base 7.

%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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Last modified May 17 14:19 EDT 2022. Contains 353746 sequences. (Running on oeis4.)