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A044785 Numbers n such that string 7,2 occurs in the base 10 representation of n but not of n+1. 0
72, 172, 272, 372, 472, 572, 672, 729, 772, 872, 972, 1072, 1172, 1272, 1372, 1472, 1572, 1672, 1729, 1772, 1872, 1972, 2072, 2172, 2272, 2372, 2472, 2572, 2672, 2729, 2772, 2872, 2972, 3072, 3172, 3272, 3372, 3472, 3572 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..39.

MATHEMATICA

Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {7, 2}]>0, 1, 0], {n, 3600}], {1, 0}]][[1]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, May 29 2016 *)

CROSSREFS

Sequence in context: A302364 A208087 A044404 * A254437 A304376 A028977

Adjacent sequences: A044782 A044783 A044784 * A044786 A044787 A044788

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 5 01:43 EST 2022. Contains 358572 sequences. (Running on oeis4.)