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A284847 Positions of 1 in A284792; complement of A284820. 2
2, 3, 5, 9, 11, 12, 14, 17, 20, 21, 23, 27, 30, 31, 33, 36, 38, 39, 41, 45, 47, 48, 50, 53, 56, 57, 59, 62, 64, 65, 67, 71, 74, 75, 77, 81, 83, 84, 86, 89, 92, 93, 95, 99, 102, 103, 105, 108, 110, 111, 113, 117, 120, 121, 123, 127, 129, 130, 132, 135, 138 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) - a(n-1) is in {1,2,3,4} for n>=2.  Conjecture: a(n)/n -> 9/4.

LINKS

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

EXAMPLE

As a word, A284627 = 011010001011010010011010001..., in which 1 is in positions 2,3,5,9,11,...

MATHEMATICA

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

w = StringJoin[Map[ToString, s]]

w1 = StringReplace[w, {"1100" -> "0"}]

st = ToCharacterCode[w1] - 48  (* A284792 *)

Flatten[Position[st, 0]]  (* A284820 *)

Flatten[Position[st, 1]]  (* A284847 *)

CROSSREFS

Cf. A010060, A284792, A284820.

Sequence in context: A174512 A056144 A284626 * A186776 A290475 A191183

Adjacent sequences:  A284844 A284845 A284846 * A284848 A284849 A284850

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 10 2017

STATUS

approved

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Last modified March 3 04:22 EST 2021. Contains 341756 sequences. (Running on oeis4.)