



2, 3, 4, 5, 7, 10, 11, 12, 14, 15, 16, 18, 19, 20, 21, 24, 25, 26, 28, 29, 30, 32, 33, 34, 35, 38, 39, 40, 42, 43, 44, 46, 47, 48, 49, 52, 53, 54, 56, 57, 58, 60, 61, 62, 64, 65, 66, 67, 69, 72, 73, 74, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 90, 91, 92, 93
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OFFSET

1,1


COMMENTS

Conjecture: 2 < n*sqrt(2)  a(n) < 1 for n>=1.


LINKS

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


EXAMPLE

As a word, A285274 = 011110..., in which 1 is in positions 2,3,4,5,7,10,...


MATHEMATICA

s = Nest[Flatten[# /. {0 > {1, 0}, 1 > {0, 1, 1, 1}}] &, {0}, 10]; (* A285274 *)
Flatten[Position[s, 0]]; (* A285275 *)
Flatten[Position[s, 1]]; (* A285276 *)


CROSSREFS

Cf. A285274, A285277, A285278.
Sequence in context: A254318 A047502 A117092 * A002504 A133431 A305705
Adjacent sequences: A285273 A285274 A285275 * A285277 A285278 A285279


KEYWORD

nonn,easy


AUTHOR

Clark Kimberling, Apr 24 2017


STATUS

approved



