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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A044565 Numbers n such that string 6,4 occurs in the base 7 representation of n but not of n+1. 0
46, 95, 144, 193, 242, 291, 328, 340, 389, 438, 487, 536, 585, 634, 671, 683, 732, 781, 830, 879, 928, 977, 1014, 1026, 1075, 1124, 1173, 1222, 1271, 1320, 1357, 1369, 1418, 1467, 1516, 1565, 1614, 1663, 1700, 1712, 1761, 1810 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {6, 4}]>0, 1, 0], {n, 2000}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Dec 10 2019 *)

CROSSREFS

Sequence in context: A004923 A260568 A044184 * A252695 A252688 A119417

Adjacent sequences:  A044562 A044563 A044564 * A044566 A044567 A044568

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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 17 03:11 EDT 2022. Contains 356180 sequences. (Running on oeis4.)