OFFSET
1,2
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = n + 1 + Sum{floor[(n - k)/sqrt(5)], k = 0..n}.
MATHEMATICA
Table[n + 1 + Sum[Floor[(n - k)/Sqrt[5]], {k, 0, n}], {n, 0, 200}] (* A022780 *)
(* Clark Kimberling, Mar 14 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved