A284847 - OEIS

A284847

Positions of 1 in the {1100->0}-transform of A010060; complement of A284820.

2, 3, 5, 9, 11, 12, 14, 17, 20, 21, 23, 27, 30, 31, 33, 36, 38, 39, 41, 45, 47, 48, 50, 53, 56, 57, 59, 62, 64, 65, 67, 71, 74, 75, 77, 81, 83, 84, 86, 89, 92, 93, 95, 99, 102, 103, 105, 108, 110, 111, 113, 117, 120, 121, 123, 127, 129, 130, 132, 135, 138

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

a(n) - a(n-1) is in {1,2,3,4} for n>=2. Conjecture: a(n)/n -> 9/4.

LINKS

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

EXAMPLE

The {1100->0}-transform of A010060 begins with the word 011010001011010010011010001..., in which 1 is in positions 2,3,5,9,11,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {1, 0}}] &, {0}, 9] (* A010060 *)

w = StringJoin[Map[ToString, s]]