A044650 Numbers n such that string 2,0 occurs in the base 9 representation of n but not of n+1.

18, 99, 170, 180, 261, 342, 423, 504, 585, 666, 747, 828, 899, 909, 990, 1071, 1152, 1233, 1314, 1395, 1538, 1557, 1628, 1638, 1719, 1800, 1881, 1962, 2043, 2124, 2205, 2286, 2357, 2367, 2448, 2529, 2610, 2691, 2772, 2853

Offset

1,1

Links

Table of n, a(n) for n=1..40.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {2, 0}]>0, 1, 0], {n, 3000}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Oct 08 2020 *)

Crossrefs

Sequence in context: A318063 A177371 A044269 * A008920 A221911 A263999

Adjacent sequences: A044647 A044648 A044649 * A044651 A044652 A044653

Keyword

nonn,base

Author

Clark Kimberling

Status

approved