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A031984 Numbers with exactly five distinct base-7 digits. 1

%I #16 Aug 10 2021 14:52:58

%S 2524,2525,2526,2530,2532,2533,2537,2538,2540,2544,2545,2546,2566,

%T 2567,2568,2578,2581,2582,2585,2587,2589,2592,2594,2595,2614,2616,

%U 2617,2620,2623,2624,2634,2635,2638,2641,2642,2644

%N Numbers with exactly five distinct base-7 digits.

%H Harvey P. Dale, <a href="/A031984/b031984.txt">Table of n, a(n) for n = 1..10000</a>

%t Select[Range[2700],Length[Union[IntegerDigits[#,7]]]==5&] (* _Harvey P. Dale_, Feb 11 2020 *)

%Y Cf. A007093.

%K nonn,base

%O 1,1

%A _Clark Kimberling_

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Last modified April 14 14:16 EDT 2024. Contains 371665 sequences. (Running on oeis4.)