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A285531 Positions of 0 in A285530; complement of A285532. 6
1, 3, 4, 5, 7, 8, 11, 13, 14, 19, 21, 22, 23, 25, 26, 27, 29, 30, 31, 33, 34, 35, 37, 38, 39, 41, 42, 45, 47, 48, 53, 55, 56, 57, 59, 60, 61, 63, 64, 65, 67, 68, 71, 73, 74, 81, 83, 84, 89, 91, 92, 93, 95, 96, 99, 101, 102, 107, 109, 110, 111, 113, 114, 115 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture:  a(n)/n -> 2.

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

EXAMPLE

As a word, A285530 = 01000100..., in which 0 is in positions 1,3,4,5,7,...

MAPLE

f:= proc(i) if i=0 then (1, 1) else (0, 1, 0, 0) fi end proc:

S:= [0]:

while numboccur(0, S) < 10000 do

   S:= map(f, map(f, S))

od:

ListTools:-SearchAll(0, S); # Robert Israel, Nov 04 2019

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {0, 1, 0, 0}}] &, {0}, 8] (* A285530 *)

Flatten[Position[s, 0]]  (* A285531 *)

Flatten[Position[s, 1]]  (* A285532 *)

CROSSREFS

Cf. A285530, A285532, A285533.

Sequence in context: A257408 A131613 A138494 * A111801 A108372 A325131

Adjacent sequences:  A285528 A285529 A285530 * A285532 A285533 A285534

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Apr 30 2017

STATUS

approved

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Last modified December 7 22:29 EST 2019. Contains 329850 sequences. (Running on oeis4.)