login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A300868 Lexicographically earliest sequence of distinct positive terms such that, for any n > 0, n * a(n) is a Fibbinary number (A003714). 2
1, 2, 3, 4, 8, 6, 12, 5, 9, 13, 15, 7, 10, 19, 11, 16, 17, 18, 14, 26, 32, 24, 23, 22, 41, 20, 38, 39, 36, 43, 44, 21, 33, 34, 59, 29, 64, 27, 28, 52, 25, 49, 30, 31, 53, 46, 47, 48, 42, 82, 51, 40, 45, 76, 96, 78, 72, 73, 35, 71, 84, 75, 86, 37, 65, 66, 70 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This sequence is a self inverse permutation of the natural numbers.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Index entries for sequences that are permutations of the natural numbers

Rémy Sigrist, Colored logarithmic scatterplot of the first 2^15 terms (where the color is function of A070939(n * a(n)))

Rémy Sigrist, C++ program for A300868

EXAMPLE

The first terms, alongside the binary representation of n * a(n), are:

  n  a(n)    binary(n * a(n))

  -- ----    ----------------

   1    1             1

   2    2           100

   3    3          1001

   4    4         10000

   5    8        101000

   6    6        100100

   7   12       1010100

   8    5        101000

   9    9       1010001

  10   13      10000010

  11   15      10100101

  12    7       1010100

  13   10      10000010

  14   19     100001010

  15   11      10100101

  16   16     100000000

  17   17     100100001

  18   18     101000100

  19   14     100001010

  20   26    1000001000

PROG

(C++) See Links section.

CROSSREFS

Cf. A003714, A070939.

Sequence in context: A229927 A222256 A223540 * A176077 A263694 A210743

Adjacent sequences:  A300865 A300866 A300867 * A300869 A300870 A300871

KEYWORD

nonn,look,base

AUTHOR

Rémy Sigrist, Mar 14 2018

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 September 17 06:00 EDT 2019. Contains 327119 sequences. (Running on oeis4.)