A044324 Numbers n such that string 8,1 occurs in the base 9 representation of n but not of n-1.

73, 154, 235, 316, 397, 478, 559, 640, 657, 721, 802, 883, 964, 1045, 1126, 1207, 1288, 1369, 1386, 1450, 1531, 1612, 1693, 1774, 1855, 1936, 2017, 2098, 2115, 2179, 2260, 2341, 2422, 2503, 2584, 2665, 2746, 2827, 2844

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {8, 1}]>0, 1, 0], {n, 3000}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Dec 18 2018 *)

Crossrefs

Sequence in context: A138642 A142179 A124363 * A044705 A248399 A071844

Adjacent sequences: A044321 A044322 A044323 * A044325 A044326 A044327

Keyword

nonn,base

Author

Clark Kimberling

Status

approved