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A284507
Positions of 1 in A284505; complement of A284506.
3
1, 2, 5, 6, 9, 10, 11, 12, 15, 16, 19, 20, 21, 22, 25, 26, 29, 30, 33, 34, 37, 38, 39, 40, 43, 44, 47, 48, 49, 50, 53, 54, 57, 58, 61, 62, 65, 66, 67, 68, 71, 72, 75, 76, 77, 78, 81, 82, 85, 86, 87, 88, 91, 92, 95, 96, 97, 98, 101, 102, 105, 106, 109, 110
OFFSET
1,2
COMMENTS
Conjecture: -2 < n*sqrt(3) - a(n) < 4 for n >= 1.
LINKS
EXAMPLE
The first 10 letters of the word in A284505 are 1100110011, in which the positions of 1 are 1,2,5,6,9,10.
MATHEMATICA
s = Nest[Flatten[# /. {0 -> {1}, 1 -> {1, 1, 0, 0}}] &, {0}, 16]; (* A284505 *)
Flatten[Position[s, 0]]; (* A284506 *)
Flatten[Position[s, 1]]; (* A284507 *)
CROSSREFS
Sequence in context: A007573 A285663 A143909 * A284492 A224779 A171888
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Apr 04 2017
STATUS
approved