login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A044731 Numbers n such that string 1,8 occurs in the base 10 representation of n but not of n+1. 0
18, 118, 189, 218, 318, 418, 518, 618, 718, 818, 918, 1018, 1118, 1189, 1218, 1318, 1418, 1518, 1618, 1718, 1899, 1918, 2018, 2118, 2189, 2218, 2318, 2418, 2518, 2618, 2718, 2818, 2918, 3018, 3118, 3189, 3218, 3318, 3418 (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, 8}]>0, 1, 0], {n, 3500}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jan 02 2020 *)

CROSSREFS

Sequence in context: A022678 A293878 A044350 * A190705 A108648 A264360

Adjacent sequences:  A044728 A044729 A044730 * A044732 A044733 A044734

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 21 19:59 EDT 2021. Contains 345365 sequences. (Running on oeis4.)