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A044727 Numbers n such that string 1,4 occurs in the base 10 representation of n but not of n+1. 0

%I

%S 14,114,149,214,314,414,514,614,714,814,914,1014,1114,1149,1214,1314,

%T 1499,1514,1614,1714,1814,1914,2014,2114,2149,2214,2314,2414,2514,

%U 2614,2714,2814,2914,3014,3114,3149,3214,3314,3414

%N Numbers n such that string 1,4 occurs in the base 10 representation of n but not of n+1.

%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n],{1,4}]>0,1,0],{n,3500}],{1,0}][[All,1]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Feb 19 2020 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_

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Last modified October 25 01:40 EDT 2021. Contains 348233 sequences. (Running on oeis4.)