OFFSET
1,1
COMMENTS
Any product of m > 1 Fibonacci numbers > 1 belongs to the sequence except for 4, 18, 48, and 72.
LINKS
M. Farrokhi D. G., Table of n, a(n) for n = 1..10000
M. Farrokhi D. G., Some remarks on the equation F_n=kF_m in Fibonacci numbers, J. Integer Seq. 10 (2007), no. 5, Article 07.5.7, 9 pp.
PROG
(GAP) l := Filtered(Set(List(Cartesian([1..21], [1..21]), x -> Fibonacci(x[1] * x[2])/Fibonacci(x[1]))), x -> x < 10000);;
Filtered([1..10000], x -> not x in l);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
M. Farrokhi D. G., Jul 24 2020
STATUS
approved