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A044732 Numbers n such that string 1,9 occurs in the base 10 representation of n but not of n+1. 0
19, 119, 199, 219, 319, 419, 519, 619, 719, 819, 919, 1019, 1119, 1199, 1219, 1319, 1419, 1519, 1619, 1719, 1819, 1999, 2019, 2119, 2199, 2219, 2319, 2419, 2519, 2619, 2719, 2819, 2919, 3019, 3119, 3199, 3219, 3319, 3419 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {1, 9}]>0, 1, 0], {n, 3500}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Dec 23 2018 *)

CROSSREFS

Sequence in context: A213556 A293879 A044351 * A159851 A221372 A252924

Adjacent sequences:  A044729 A044730 A044731 * A044733 A044734 A044735

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 7 13:08 EST 2021. Contains 349581 sequences. (Running on oeis4.)