OFFSET
1,1
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = floor(n*r) - floor(n*r - r), where r = 1 + sqrt(5), n >= 1.
a(n) = A188187(n) + 3, as follows right from the definitions. - Michel Dekking, Sep 02 2019
a(n) = 1+floor(n*sqrt(5))-floor((n-1)*sqrt(5)). - Chai Wah Wu, Mar 16 2021
MATHEMATICA
PROG
(Python)
from sympy import integer_nthroot
def A276863(n): return 1+integer_nthroot(5*n**2, 2)[0]-integer_nthroot(5*(n-1)**2, 2)[0] # Chai Wah Wu, Mar 16 2021
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Sep 24 2016
STATUS
approved