



1, 2, 3, 5, 6, 7, 9, 10, 11, 13, 15, 16, 17, 19, 20, 21, 23, 24, 25, 27, 29, 30, 31, 33, 34, 35, 37, 38, 39, 41, 43, 44, 45, 47, 49, 50, 51, 53, 54, 55, 57, 58, 59, 61, 63, 64, 65, 67, 68, 69, 71, 72, 73, 75, 77, 78, 79, 81, 82, 83, 85, 86, 87, 89, 91, 92
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OFFSET

1,2


COMMENTS

Conjecture: 0 < n*sqrt(2)  a(n) < 3 for n>=1.


LINKS

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


EXAMPLE

As a word, A285373 = 11101110..., in which 1 is in positions 1,2,3,5,6,7,9,...


MATHEMATICA

s = Nest[Flatten[# /. {0 > {1, 0}, 1 > {1, 1, 1, 0}}] &, {0}, 10] (* A285373 *)
Flatten[Position[s, 0]] (* A285374 *)
Flatten[Position[s, 1]] (* A285375 *)


CROSSREFS

Cf. A284373, A285374, A285376.
Sequence in context: A074235 A325366 A192189 * A321372 A001948 A121912
Adjacent sequences: A285372 A285373 A285374 * A285376 A285377 A285378


KEYWORD

nonn,easy


AUTHOR

Clark Kimberling, Apr 26 2017


STATUS

approved



