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A043194 Numbers n such that 1 and 8 occur juxtaposed in the base 9 representation of n but not of n-1. 0
17, 73, 98, 153, 179, 235, 260, 316, 341, 397, 422, 478, 503, 559, 584, 640, 657, 721, 746, 802, 827, 882, 908, 964, 989, 1045, 1070, 1126, 1151, 1207, 1232, 1288, 1313, 1369, 1377, 1475, 1531, 1556, 1611, 1637, 1693, 1718 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {1, 8}]> 0 || SequenceCount[IntegerDigits[n, 9], {8, 1}]>0, 1, 0], {n, 2000}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Nov 23 2019 *)

CROSSREFS

Sequence in context: A144245 A307718 A139919 * A043974 A141972 A161735

Adjacent sequences:  A043191 A043192 A043193 * A043195 A043196 A043197

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified April 7 03:42 EDT 2020. Contains 333292 sequences. (Running on oeis4.)