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A284902 Positions of 0 in A284901; complement of A284903. 3
1, 4, 5, 6, 8, 9, 10, 11, 13, 15, 18, 19, 20, 21, 23, 25, 27, 30, 31, 32, 33, 36, 37, 38, 39, 42, 43, 44, 46, 47, 48, 49, 51, 53, 55, 58, 59, 60, 61, 64, 65, 66, 67, 70, 71, 72, 73, 76, 77, 78, 80, 81, 82, 83, 85, 87, 89, 92, 93, 94, 96, 97, 98, 99, 101, 103 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture: -3 < n*r - a(n) < 3 for n >= 1, where r = (3+sqrt(3))/3.

LINKS

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

EXAMPLE

As a word, A284901 = 01100010..., in which 0 is in positions 1,4,5,6,8,9,11,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {0, 0, 1, 1}}] &, {0}, 6] (* A284901 *)

Flatten[Position[s, 0]]  (* A284902 *)

Flatten[Position[s, 1]]  (* A284903 *)

CROSSREFS

Cf. A284901, A284903.

Sequence in context: A088720 A134848 A061578 * A023851 A285279 A091242

Adjacent sequences:  A284899 A284900 A284901 * A284903 A284904 A284905

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Apr 16 2017

STATUS

approved

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Last modified January 20 11:01 EST 2020. Contains 331083 sequences. (Running on oeis4.)