



1, 2, 5, 6, 9, 10, 13, 14, 21, 22, 25, 26, 33, 34, 37, 38, 41, 42, 45, 46, 49, 50, 53, 54, 61, 62, 65, 66, 73, 74, 77, 78, 81, 82, 85, 86, 89, 90, 93, 94, 101, 102, 105, 106, 113, 114, 117, 118, 121, 122, 125, 126, 129, 130, 133, 134, 141, 142, 145, 146, 153
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OFFSET

1,2


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, A285501 = 00110011..., in which 0 is in positions 1,2,5,6,9,...


MATHEMATICA

s = Nest[Flatten[# /. {0 > {1, 1}, 1 > {0, 0, 1, 1}}] &, {0}, 8] (* A285501 *)
Flatten[Position[s, 0]] (* A285502 *)
Flatten[Position[s, 1]] (* A285503 *)


CROSSREFS

Cf. A285501, A285503, A285504.
Sequence in context: A264120 A327220 A166097 * A276883 A288552 A187583
Adjacent sequences: A285499 A285500 A285501 * A285503 A285504 A285505


KEYWORD

nonn,easy


AUTHOR

Clark Kimberling, Apr 30 2017


STATUS

approved



