OFFSET
0,4
LINKS
P. Ferraro, Problem B-1288, Fibonacci Q., 59 (No. 2, May 2021) p. 177.
FORMULA
a(n) = floor(sqrt(A001654(n))).
MATHEMATICA
a[n_] := Floor[Sqrt[Fibonacci[n + 1] * Fibonacci[n]]]; Array[a, 42, 0] (* Amiram Eldar, May 19 2022 *)
PROG
(PARI) a(n) = sqrtint(fibonacci(n+1)*fibonacci(n));
(Python)
from math import prod
from gmpy2 import isqrt, fib2
def A354210(n): return int(isqrt(prod(fib2(n+1)))) # Chai Wah Wu, May 19 2022
CROSSREFS
KEYWORD
nonn
AUTHOR
Michel Marcus, May 19 2022
STATUS
approved