



2, 4, 6, 7, 8, 9, 11, 13, 15, 17, 18, 19, 20, 22, 24, 26, 28, 29, 30, 31, 33, 34, 35, 36, 38, 39, 40, 41, 43, 44, 45, 46, 48, 50, 52, 54, 55, 56, 57, 59, 61, 63, 65, 66, 67, 68, 70, 72, 74, 76, 77, 78, 79, 81, 83, 85, 87, 88, 89, 90, 92, 93, 94, 95, 97, 98
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS

Conjecture: a(n)/n > (5 + sqrt(13))/6.


LINKS

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


EXAMPLE

As a word, A284957 = 10101000010..., in which 0 is in positions 2,4,6,7,8,9,...


MATHEMATICA

s = Nest[Flatten[# /. {0 > {1, 0}, 1 > {0, 0, 0}}] &, {0}, 9]; (* A284957 *)
Flatten[Position[s, 0]]; (* A284958 *)
Flatten[Position[s, 1]]; (* A284959 *)


CROSSREFS

Cf. A284957, A284959.
Sequence in context: A039045 A050481 A285416 * A014530 A268445 A053663
Adjacent sequences: A284955 A284956 A284957 * A284959 A284960 A284961


KEYWORD

nonn,easy


AUTHOR

Clark Kimberling, Apr 18 2017


STATUS

approved



