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A044425 Numbers n such that string 9,3 occurs in the base 10 representation of n but not of n-1. 0

%I #7 May 25 2016 17:46:57

%S 93,193,293,393,493,593,693,793,893,930,993,1093,1193,1293,1393,1493,

%T 1593,1693,1793,1893,1930,1993,2093,2193,2293,2393,2493,2593,2693,

%U 2793,2893,2930,2993,3093,3193,3293,3393,3493,3593

%N Numbers n such that string 9,3 occurs in the base 10 representation of n but not of n-1.

%t Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n],{9,3}]>0,1,0],{n,4000}],{0,1}]][[2]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* _Harvey P. Dale_, May 25 2016 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_

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Last modified April 21 04:17 EDT 2024. Contains 371850 sequences. (Running on oeis4.)