A284506 Positions of 0 in A284505; complement of A284507.

3, 4, 7, 8, 13, 14, 17, 18, 23, 24, 27, 28, 31, 32, 35, 36, 41, 42, 45, 46, 51, 52, 55, 56, 59, 60, 63, 64, 69, 70, 73, 74, 79, 80, 83, 84, 89, 90, 93, 94, 99, 100, 103, 104, 107, 108, 111, 112, 117, 118, 121, 122, 127, 128, 131, 132, 135, 136, 139, 140, 145

Offset

1,1

Comments

Conjecture: -3 < n*r - a(n) < 4 for n >= 1, where r = (3+sqrt(3))/2.

Links

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

Example

The first 10 letters of the word in A284505 are 1100110011, in which the positions of 0 are 3,4,7,8.

Mathematica

s = Nest[Flatten[# /. {0 -> {1}, 1 -> {1, 1, 0, 0}}] &, {0}, 16]; (* A284505 *)
Flatten[Position[s, 0]];  (* A284506 *)
Flatten[Position[s, 1]];  (* A284507 *)

Crossrefs

Cf. A284505, A284507.

Sequence in context: A003141 A338467 A284491 * A157419 A008368 A023054

Adjacent sequences: A284503 A284504 A284505 * A284507 A284508 A284509

Keyword

nonn,easy

Author

Clark Kimberling, Apr 04 2017

Status

approved