OFFSET
1,1
COMMENTS
Conjecture: a(n)/n -> 3, and 0 < 3 - a(n)/n < 1 for n >= 1.
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = 3*n-1-HammingWeight(n-1) = 3*n-1-A000120(n-1) (conjectured). - Gleb Koloskov, May 06 2021
MATHEMATICA
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jun 25 2017
STATUS
approved