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A285306

Positions of 0 in A285305; complement of A285307.

2, 3, 6, 8, 10, 11, 14, 15, 18, 20, 21, 24, 26, 27, 30, 32, 34, 35, 38, 39, 42, 44, 46, 47, 50, 51, 54, 56, 57, 60, 62, 64, 65, 68, 69, 72, 74, 75, 78, 80, 82, 83, 86, 87, 90, 92, 93, 96, 98, 99, 102, 104, 106, 107, 110, 111, 114, 116, 118, 119, 122, 123

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OFFSET

1,1

COMMENTS

Let s(n) = 2n - a(n). It appears that s(n) is a 01-sequence with 0 in positions given by A189665 and 1 in positions given by A189660.

LINKS

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

EXAMPLE

As a word, A285305 = 1001101..., in which 0 is in positions 2,3,6,8,10,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 1, 1, 1}}] &, {0}, 10]; (* A285274 *)

Flatten[Position[s, 0]]; (* A285275 *)