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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
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
Sequence in context: A257408 A131613 A138494 * A111801 A108372 A325131
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Apr 30 2017
STATUS
approved

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Last modified June 25 09:15 EDT 2024. Contains 373701 sequences. (Running on oeis4.)