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A044186 Numbers n such that string 6,6 occurs in the base 7 representation of n but not of n-1. 0

%I #7 May 31 2016 11:00:07

%S 48,97,146,195,244,293,336,391,440,489,538,587,636,679,734,783,832,

%T 881,930,979,1022,1077,1126,1175,1224,1273,1322,1365,1420,1469,1518,

%U 1567,1616,1665,1708,1763,1812,1861,1910,1959,2008

%N Numbers n such that string 6,6 occurs in the base 7 representation of n but not of n-1.

%t Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n,7],{6,6}]>0,1,0],{n,2100}],{0,1}]][[2]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* _Harvey P. Dale_, May 31 2016 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_

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Last modified May 29 05:22 EDT 2024. Contains 372921 sequences. (Running on oeis4.)