OFFSET
1,1
COMMENTS
a(n) - a(n-1) is in {2,3} for n>=2, and a(n)/n -> (12 + 3*sqrt(2))/7.
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
EXAMPLE
As a word, A286990 = 1011010101011010101011..., in which 0 is in positions 2,5,7,9,....
MATHEMATICA
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, May 19 2017
STATUS
approved