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A044722 Numbers n such that string 0,9 occurs in the base 10 representation of n but not of n+1. 0
109, 209, 309, 409, 509, 609, 709, 809, 909, 1009, 1099, 1109, 1209, 1309, 1409, 1509, 1609, 1709, 1809, 1909, 2009, 2099, 2109, 2209, 2309, 2409, 2509, 2609, 2709, 2809, 2909, 3009, 3099, 3109, 3209, 3309, 3409, 3509 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..38.

MATHEMATICA

Select[Range[3600], MemberQ[Partition[IntegerDigits[#], 2, 1], {0, 9}] && !MemberQ[Partition[IntegerDigits[#+1], 2, 1], {0, 9}]&] (* Harvey P. Dale, Feb 22 2012 *)

CROSSREFS

Sequence in context: A061879 A171121 A044341 * A142697 A142777 A142797

Adjacent sequences:  A044719 A044720 A044721 * A044723 A044724 A044725

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 20 23:04 EDT 2021. Contains 347596 sequences. (Running on oeis4.)