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A285254 Positions of 1 in A285252; complement of A285253. 3
1, 4, 6, 7, 10, 12, 14, 16, 17, 20, 22, 23, 25, 28, 30, 31, 34, 36, 38, 40, 41, 43, 46, 48, 49, 52, 54, 55, 58, 60, 61, 64, 66, 68, 70, 71, 74, 76, 77, 79, 82, 84, 85, 88, 90, 92, 94, 95, 97, 100, 102, 103, 106, 108, 110, 112, 113, 115, 118, 120, 121, 124 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture: 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, A285249 = 100101100101..., in which 1 is in positions 1,4,6,7,10,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 1, 0, 1}}] &, {0}, 11]; (* A285252 *)

Flatten[Position[s, 0]];  (* A285253 *)

Flatten[Position[s, 1]];  (* A285254 *)

CROSSREFS

Cf. A285250, A285252, A285253.

Sequence in context: A191920 A047234 A089532 * A326227 A103401 A285091

Adjacent sequences:  A285251 A285252 A285253 * A285255 A285256 A285257

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Apr 23 2017

STATUS

approved

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Last modified November 16 17:04 EST 2019. Contains 329201 sequences. (Running on oeis4.)