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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A286420 Positions of 0 in A286419; complement of A286421. 3
1, 7, 8, 10, 15, 18, 19, 25, 26, 28, 31, 32, 37, 43, 44, 46, 51, 54, 55, 60, 66, 67, 69, 72, 73, 79, 80, 82, 87, 90, 91, 97, 98, 100, 103, 104, 109, 115, 116, 118, 121, 122, 128, 129, 131, 136, 139, 140, 145, 151, 152, 154, 159, 162, 163, 169, 170, 172, 175 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) - a(n-1) is in {1,2,3,5,6} for n>=2.  Conjecture: a(n)/n -> 3.

LINKS

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

EXAMPLE

As a word, A286419 = 011111001011110110011..., in which 0 is in positions 1,7,8,10,15,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {1, 0}}] &, {0}, 9] (* A010060 *)

w = StringJoin[Map[ToString, s]]

w1 = StringReplace[w, {"0100" -> "1"}]

st = ToCharacterCode[w1] - 48  (* A286419 *)

Flatten[Position[st, 0]]  (* A286420 *)

Flatten[Position[st, 1]]  (* A286421 *)

CROSSREFS

Cf. A010060, A286419, A286421.

Sequence in context: A141676 A127164 A153972 * A111064 A071117 A054221

Adjacent sequences:  A286417 A286418 A286419 * A286421 A286422 A286423

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 09 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 20 10:13 EDT 2019. Contains 324234 sequences. (Running on oeis4.)