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!)
A284685 Positions of 1 in A284627; complement of A284684. 3
2, 3, 5, 6, 9, 11, 12, 14, 17, 19, 20, 21, 23, 24, 27, 29, 30, 31, 33, 36, 38, 39, 41, 42, 45, 47, 48, 50, 53, 55, 56, 57, 59, 62, 64, 65, 67, 68, 71, 73, 74, 75, 77, 78, 81, 83, 84, 86, 89, 91, 92, 93, 95, 96, 99, 101, 102, 103, 105, 108, 110, 111, 113, 114 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) - a(n-1) is in {1,2,3} for n>=2.  Conjecture: a(n)/n -> 9/5.

LINKS

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

EXAMPLE

As a word, A284627 = 0110110010110100101110..., in which 1 is in positions 2,3,5,6,9,...

MATHEMATICA

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

w = StringJoin[Map[ToString, s]]

w1 = StringReplace[w, {"0011" -> "1"}]

st = ToCharacterCode[w1] - 48  (* A284627 *)

Flatten[Position[st, 0]]  (* A284684 *)

Flatten[Position[st, 1]]  (* A284685 *)

CROSSREFS

Cf. A010060, A284627, A284684.

Sequence in context: A026168 A286402 A175007 * A113238 A104214 A046657

Adjacent sequences:  A284682 A284683 A284684 * A284686 A284687 A284688

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 10 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 February 26 05:51 EST 2020. Contains 332277 sequences. (Running on oeis4.)