A284906 Positions of 0 in A284905; complement of A284907.

1, 4, 5, 8, 9, 11, 13, 16, 17, 20, 21, 23, 25, 28, 29, 31, 34, 35, 37, 40, 41, 44, 45, 47, 49, 52, 53, 56, 57, 59, 61, 64, 65, 67, 70, 71, 73, 76, 77, 80, 81, 83, 85, 88, 89, 91, 94, 95, 98, 99, 101, 103, 106, 107, 109, 112, 113, 116, 117, 119, 121, 124, 125

Offset

1,2

Comments

2n - a(n) is in {0,1} for n >=1.

See the comments of A285250 for a proof of this conjecture. - Michel Dekking, Oct 07 2020

Links

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

Example

As a word, A284905 = 011001..., in which 0 is in positions 1,4,5,8,9,...

Mathematica

s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {1, 0, 0, 1}}] &, {0}, 6] (* A284905 *)
Flatten[Position[s, 0]]  (* A284906 *)
Flatten[Position[s, 1]]  (* A284907 *)

Crossrefs

Cf. A285250, A284905, A284907.

Sequence in context: A042956 A128217 A288671 * A285260 A190671 A042948

Adjacent sequences: A284903 A284904 A284905 * A284907 A284908 A284909

Keyword

nonn,easy

Author

Clark Kimberling, Apr 17 2017

Status

approved