A044724 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A044724

Numbers n such that string 1,1 occurs in the base 10 representation of n but not of n+1.

11, 119, 211, 311, 411, 511, 611, 711, 811, 911, 1011, 1199, 1211, 1311, 1411, 1511, 1611, 1711, 1811, 1911, 2011, 2119, 2211, 2311, 2411, 2511, 2611, 2711, 2811, 2911, 3011, 3119, 3211, 3311, 3411, 3511, 3611, 3711, 3811

(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, 1}]>0, 1, 0], {n, 4000}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 22 2018 *)

CROSSREFS

Sequence in context: A268344 A289344 A240392 * A125468 A163447 A254600

Adjacent sequences: A044721 A044722 A044723 * A044725 A044726 A044727

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved