



3, 4, 7, 8, 15, 16, 19, 20, 27, 28, 31, 32, 35, 36, 39, 40, 43, 44, 47, 48, 55, 56, 59, 60, 67, 68, 71, 72, 75, 76, 79, 80, 83, 84, 87, 88, 95, 96, 99, 100, 107, 108, 111, 112, 119, 120, 123, 124, 131, 132, 135, 136, 143, 144, 147, 148, 155, 156, 159, 160
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OFFSET

1,1


COMMENTS

Conjecture: a(n)/n > (3 + sqrt(5))/2.


LINKS

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


EXAMPLE

As a word, A285661 = 110011001..., in which 0 is in positions 3,4,7,8,15,...


MATHEMATICA

s = Nest[Flatten[# /. {0 > {1, 1}, 1 > {1, 1, 0, 0}}] &, {0}, 9] (* A285661 *)
Flatten[Position[s, 0]] (* A285662 *)
Flatten[Position[s, 1]] (* A285663 *)


CROSSREFS

Cf. A285661, A285663.
Sequence in context: A117471 A217135 A323247 * A112062 A037013 A050069
Adjacent sequences: A285659 A285660 A285661 * A285663 A285664 A285665


KEYWORD

nonn,easy


AUTHOR

Clark Kimberling, May 02 2017


STATUS

approved



