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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A286996 {0->000, 11->null}-transform of the Sturmian word A080764. 3
0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1

COMMENTS

A080764 = 1101101110110111011011011101..., and replacing each 0 by 000 and deleting each 11 gives 000000100000010000000001000000100..., in which the positions of 0 are given by A286997, and of 1, by A188383.

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..10000

MATHEMATICA

s = Nest[Flatten[# /. {0 -> 1, 1 -> {1, 1, 0}}] &, {1}, 11]; (* Sturmian word A080764 *)

w = StringJoin[Map[ToString, s]];

w1 = StringReplace[w, {"0" -> "000", "11"->""}]

st = ToCharacterCode[w1] - 48 ; (* A286996 *)

Flatten[Position[st, 0]];  (* A286997 *)

Flatten[Position[st, 1]];  (* A188383 *)

CROSSREFS

Cf. A080764, A286997, A188383.

Sequence in context: A023972 A103674 A185708 * A044937 A025459 A079365

Adjacent sequences:  A286993 A286994 A286995 * A286997 A286998 A286999

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 19 2017

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 16 12:38 EDT 2019. Contains 324152 sequences. (Running on oeis4.)