OFFSET
1,1
COMMENTS
a(n) - a(n-1) is in {1,2,3} for n>=2, and a(n)/n -> 4 + sqrt(8).
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
EXAMPLE
As a word, A286691 = 0100101100100101100100100101100100..., in which 1 is in positions 2,5,7,8,11,...
MATHEMATICA
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, May 14 2017
STATUS
approved