A044330 Numbers n such that string 8,7 occurs in the base 9 representation of n but not of n-1.

79, 160, 241, 322, 403, 484, 565, 646, 711, 727, 808, 889, 970, 1051, 1132, 1213, 1294, 1375, 1440, 1456, 1537, 1618, 1699, 1780, 1861, 1942, 2023, 2104, 2169, 2185, 2266, 2347, 2428, 2509, 2590, 2671, 2752, 2833, 2898

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {8, 7}]>0, 1, 0], {n, 3000}], {0, 1}]][[2]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, Jun 22 2016 *)

Crossrefs

Sequence in context: A140008 A142159 A046050 * A044711 A362360 A142307

Adjacent sequences: A044327 A044328 A044329 * A044331 A044332 A044333

Keyword

nonn,base

Author

Clark Kimberling

Status

approved