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 A044122 Numbers n such that string 3,2 occurs in the base 6 representation of n but not of n-1. 2

%I #13 Apr 23 2020 13:50:57

%S 20,56,92,120,128,164,200,236,272,308,336,344,380,416,452,488,524,552,

%T 560,596,632,668,704,720,768,776,812,848,884,920,956,984,992,1028,

%U 1064,1100,1136,1172,1200,1208,1244,1280,1316,1352,1388,1416,1424,1460,1496

%N Numbers n such that string 3,2 occurs in the base 6 representation of n but not of n-1.

%H Harvey P. Dale, <a href="/A044122/b044122.txt">Table of n, a(n) for n = 1..1000</a>

%t f[n_] := Length[StringPosition[ToString[FromDigits[IntegerDigits[n, 6]]], "32", 1]]; Select[Table[n, {n, 10000}], f[#] > 0 && f[# - 1] == 0 &] (* _Vladimir Joseph Stephan Orlovsky_, Jul 20 2011 *)

%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n,6],{3,2}]>0,1,0],{n,1500}],{0,1}][[All,2]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Apr 23 2020 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_

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Last modified August 11 13:43 EDT 2024. Contains 375069 sequences. (Running on oeis4.)