OFFSET
0,2
COMMENTS
A bisection of the lower Wythoff sequence, A000201.
LINKS
Clark Kimberling, Table of n, a(n) for n = 0..10000
N. J. A. Sloane, Families of Essentially Identical Sequences, Mar 24 2021 (Includes this sequence)
FORMULA
a(n) = floor(n*(1 + sqrt(5))).
MATHEMATICA
z = 500; r = 1+Sqrt[5]; b = Table[Floor[k*r], {k, 0, z}] (* A276854 *)
PROG
(Python)
from sympy import integer_nthroot
def A276854(n): return n+integer_nthroot(5*n**2, 2)[0] # Chai Wah Wu, Mar 16 2021
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Sep 24 2016
STATUS
approved