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A033020 Numbers whose base-7 expansion has no run of digits with length < 2. 2

%I #13 Aug 13 2021 07:27:09

%S 8,16,24,32,40,48,57,114,171,228,285,342,392,400,408,416,424,432,440,

%T 784,792,800,808,816,824,832,1176,1184,1192,1200,1208,1216,1224,1568,

%U 1576,1584,1592,1600,1608,1616,1960,1968,1976

%N Numbers whose base-7 expansion has no run of digits with length < 2.

%H Vincenzo Librandi, <a href="/A033020/b033020.txt">Table of n, a(n) for n = 1..1200</a>

%t Select[Range[10000], Min[Length/@Split[IntegerDigits[#, 7]]]>1&] (* _Vincenzo Librandi_, Feb 05 2014 *)

%Y Cf. A007093.

%K nonn,base

%O 1,1

%A _Clark Kimberling_

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Last modified April 23 14:32 EDT 2024. Contains 371914 sequences. (Running on oeis4.)