OFFSET
1,1
COMMENTS
Conjecture: a(n)/n -> 4/3.
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
EXAMPLE
As a word, A285972 = 011101101111011101..., in which 1 is in positions 2,3,4,6,7,9,...
MATHEMATICA
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, May 06 2017
STATUS
approved