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A285353 Positions of 0 in A285351; complement of A285354. 3
1, 3, 7, 9, 13, 16, 19, 21, 25, 27, 31, 34, 37, 39, 43, 46, 48, 52, 55, 57, 61, 63, 67, 70, 73, 75, 79, 81, 85, 88, 91, 93, 97, 100, 102, 106, 109, 111, 115, 117, 121, 124, 127, 129, 133, 136, 138, 142, 144, 148, 151, 154, 156, 160, 163, 165, 169, 171, 175 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture: 3n - 2 - a(n) is in {0,1} for n>=1.

LINKS

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

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {1, 1, 0, 0}}] &, {0}, 13] (* A285345 *)

u = Flatten[Position[s, 0]]  (* A285346 *)

v = Flatten[Position[s, 1]]  (* A285347 *)

t1 = Table[2*n + 1 - u[[n]], {n, 1, Length[u]}] (* A285351 *)

t2 = Table[2*n - 1 - v[[n]], {n, 1, Length[v]}] (* A285352 *)

Flatten[Position[t1, 0]]  (* A285353 *)

Flatten[Position[t1, 1]]  (* A285354 *)

Flatten[Position[t2, 0]]  (* A189668 *)

Flatten[Position[t2, 1]]  (* A189679 *)

CROSSREFS

Cf. A285345, A285346, A285351, A285354.

Sequence in context: A057701 A140291 A032367 * A063204 A236208 A284884

Adjacent sequences:  A285350 A285351 A285352 * A285354 A285355 A285356

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Apr 25 2017

STATUS

approved

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Last modified June 25 10:09 EDT 2021. Contains 345453 sequences. (Running on oeis4.)