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A031950 Numbers with exactly two distinct base-5 digits. 2

%I #18 Aug 10 2021 18:46:47

%S 5,7,8,9,10,11,13,14,15,16,17,19,20,21,22,23,25,26,30,32,33,34,36,37,

%T 41,43,46,49,50,52,56,57,60,61,63,64,67,68,72,74,75,78,81,83,87,88,90,

%U 91,92,94,98,99,100,104,106,109,112,114,118,119

%N Numbers with exactly two distinct base-5 digits.

%H <a href="/index/Ar#5-automatic">Index entries for 5-automatic sequences</a>.

%t Select[Range[150],Length[Union[IntegerDigits[#,5]]]==2&] (* _Harvey P. Dale_, Apr 13 2011 *)

%Y Cf. A007091.

%K nonn,base,easy

%O 1,1

%A _Clark Kimberling_

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Last modified April 25 09:56 EDT 2024. Contains 371967 sequences. (Running on oeis4.)