A044643 Numbers n such that string 1,2 occurs in the base 9 representation of n but not of n+1.

11, 92, 107, 173, 254, 335, 416, 497, 578, 659, 740, 821, 836, 971, 983, 1064, 1145, 1226, 1307, 1388, 1469, 1550, 1565, 1631, 1712, 1793, 1874, 1955, 2036, 2117, 2198, 2279, 2294, 2360, 2441, 2522, 2603, 2684, 2765, 2846

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {1, 2}]>0, 1, 0], {n, 3000}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jun 25 2017 *)

Crossrefs

Sequence in context: A294362 A363669 A044262 * A025507 A081575 A016150

Adjacent sequences: A044640 A044641 A044642 * A044644 A044645 A044646

Keyword

nonn,base

Author

Clark Kimberling

Status

approved