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!)
A044146 Numbers n such that string 1,1 occurs in the base 7 representation of n but not of n-1. 0
8, 56, 106, 155, 204, 253, 302, 351, 392, 449, 498, 547, 596, 645, 694, 742, 792, 841, 890, 939, 988, 1037, 1085, 1135, 1184, 1233, 1282, 1331, 1380, 1428, 1478, 1527, 1576, 1625, 1674, 1723, 1771, 1821, 1870, 1919, 1968 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..41.

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {1, 1}]>0, 1, 0], {n, 2000}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Oct 24 2017 *)

CROSSREFS

Sequence in context: A144748 A160429 A003722 * A118772 A212817 A267522

Adjacent sequences:  A044143 A044144 A044145 * A044147 A044148 A044149

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 May 11 21:35 EDT 2021. Contains 343808 sequences. (Running on oeis4.)