OFFSET
1,5
LINKS
Robert Israel, Table of n, a(n) for n = 1..2938
EXAMPLE
The 7th squarefree integer is 10 = 2*5. So a(7) = F(10)/(F(2)F(5)) = 55/(1*5) = 11.
MAPLE
count:= 0:
for n from 1 while count < 50 do
if numtheory:-issqrfree(n) then
count:= count+1;
A[count]:= combinat:-fibonacci(n)/mul(combinat:-fibonacci(p), p=numtheory:-factorset(n))
fi
od:
seq(A[i], i=1..50); # Robert Israel, Dec 04 2018
MATHEMATICA
f[n_] := Fibonacci[n]/Times @@ (Fibonacci /@ FactorInteger[n][[;; , 1]]); f /@
Select[Range[70], SquareFreeQ[#] &] (* Amiram Eldar, Dec 04 2018 *)
CROSSREFS
KEYWORD
nonn,look
AUTHOR
Leroy Quet, Feb 28 2006
EXTENSIONS
More terms from Joshua Zucker, Jul 18 2007
STATUS
approved