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A285278 Positions of 0 in A285277; complement of A285279. 5
2, 3, 7, 11, 15, 20, 21, 26, 28, 29, 33, 37, 42, 43, 47, 51, 56, 57, 61, 65, 69, 74, 76, 77, 81, 85, 90, 91, 95, 99, 104, 105, 109, 113, 117, 122, 124, 125, 129, 133, 138, 139, 143, 147, 152, 153, 157, 161, 165, 170, 172, 173, 177, 181, 186, 187, 191, 195 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Conjecture: 0 < n*r - a(n) < 6 for n>=1, where r = 2+sqrt(2).

LINKS

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

EXAMPLE

As a word, A285277 = 10011101110111..., in which 0 is in positions 2,3,7,11,15,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 1, 1, 1}}] &, {0}, 9]; (* A285277 *)

Flatten[Position[s, 0]];  (* A285278 *)

Flatten[Position[s, 1]];  (* A285279 *)

CROSSREFS

Cf. A285275, A285277, A285279.

Sequence in context: A323353 A188529 A174060 * A092353 A189374 A180516

Adjacent sequences:  A285275 A285276 A285277 * A285279 A285280 A285281

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Apr 25 2017

STATUS

approved

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Last modified January 24 04:35 EST 2020. Contains 331183 sequences. (Running on oeis4.)