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A044347 Numbers n such that string 1,5 occurs in the base 10 representation of n but not of n-1. 0
15, 115, 150, 215, 315, 415, 515, 615, 715, 815, 915, 1015, 1115, 1150, 1215, 1315, 1415, 1500, 1615, 1715, 1815, 1915, 2015, 2115, 2150, 2215, 2315, 2415, 2515, 2615, 2715, 2815, 2915, 3015, 3115, 3150, 3215, 3315, 3415 (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, 5}]>0, 1, 0], {n, 3500}], {0, 1}][[All, 2]] (* Harvey P. Dale, Aug 02 2021 *)

CROSSREFS

Sequence in context: A160075 A244872 A293875 * A113527 A044728 A091347

Adjacent sequences:  A044344 A044345 A044346 * A044348 A044349 A044350

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 16 08:18 EDT 2021. Contains 347469 sequences. (Running on oeis4.)