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A284907 Positions of 1 in A284905; complement of A284906. 3
2, 3, 6, 7, 10, 12, 14, 15, 18, 19, 22, 24, 26, 27, 30, 32, 33, 36, 38, 39, 42, 43, 46, 48, 50, 51, 54, 55, 58, 60, 62, 63, 66, 68, 69, 72, 74, 75, 78, 79, 82, 84, 86, 87, 90, 92, 93, 96, 97, 100, 102, 104, 105, 108, 110, 111, 114, 115, 118, 120, 122, 123 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

LINKS

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

EXAMPLE

As a word, A284905 = 011001..., in which 1 is in positions 2,3,6,7,10,...

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. A284905, A284907.

Sequence in context: A305927 A271585 A285259 * A330572 A287241 A331075

Adjacent sequences:  A284904 A284905 A284906 * A284908 A284909 A284910

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Apr 17 2017

STATUS

approved

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Last modified January 22 07:30 EST 2020. Contains 331139 sequences. (Running on oeis4.)