



1, 3, 4, 6, 7, 9, 11, 12, 14, 15, 17, 19, 20, 22, 23, 25, 26, 28, 29, 31, 33, 34, 36, 37, 39, 41, 42, 44, 45, 47, 48, 50, 51, 53, 55, 56, 58, 59, 61, 63, 64, 66, 67, 69, 71, 72, 74, 75, 77, 79, 80, 82, 83, 85, 86, 88, 89, 91, 93, 94, 96, 97, 99, 101, 102
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OFFSET

1,2


COMMENTS

Conjecture: 1 < n*r  a(n) < 2 for n >= 1, where r = (3+sqrt(3))/3.


LINKS



EXAMPLE

As a word, A284772 = 010010..., in which 0 is in positions 1,3,4,6,...


MATHEMATICA

s = Nest[Flatten[# /. {0 > {0, 1}, 1 > {0, 0, 1, 0}}] &, {0}, 6] (* A284772 *)
Flatten[Position[s, 0]] (* A284773 *)
Flatten[Position[s, 1]] (* A284774 *)


CROSSREFS



KEYWORD

nonn,easy


AUTHOR



STATUS

approved



