



3, 4, 8, 9, 11, 13, 17, 18, 20, 24, 27, 28, 32, 33, 37, 38, 40, 42, 46, 47, 49, 53, 56, 57, 59, 61, 65, 68, 69, 71, 73, 77, 80, 81, 85, 86, 90, 91, 93, 95, 99, 100, 102, 106, 109, 110, 112, 114, 118, 121, 122, 126, 127, 131, 132, 134, 136, 140, 143, 144, 148
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OFFSET

1,1


COMMENTS

Conjecture: 1 < n*r  a(n) < 2 for n>=1, where r = 1 + sqrt(2).


LINKS

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


EXAMPLE

As a word, A285031 = 00110..., in which 1 is in positions 3,4,8,9,11,...


MATHEMATICA

s = Nest[Flatten[# /. {0 > {1, 0}, 1 > {0, 0, 1}}] &, {0}, 8]; (* A285031 *)
Flatten[Position[s, 0]]; (* A285032 *)
Flatten[Position[s, 1]]; (* A285033 *)


CROSSREFS

Cf. A285031, A285032, A285036.
Sequence in context: A054204 A050003 A002156 * A073258 A170954 A286750
Adjacent sequences: A285030 A285031 A285032 * A285034 A285035 A285036


KEYWORD

nonn,easy


AUTHOR

Clark Kimberling, Apr 19 2017


STATUS

approved



