cp's OEIS Frontend

A178764 Ratio of the primitive part of Fibonacci(n) to the product of primitive prime factors of Fibonacci(n).

%I A178764 #3 Mar 30 2012 17:22:56
%S A178764 1,1,1,1,1,4,1,1,1,1,1,3,1,1,1,1,1,1,1,1,1,1,1,2,5,1,1,1,1,1,1,1,1,1,
%T A178764 1,3,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,7,1,1,1,1,1,1,1,1,1,1,1,1,
%U A178764 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,13,1,1,1,1,2,1,1,1,1,1,1,1,1,1
%N A178764 Ratio of the primitive part of Fibonacci(n) to the product of primitive prime factors of Fibonacci(n).
%C A178764 Except for a(6), it can be shown that all terms are either 1 or prime. In the first 10^5 terms, only 151 are greater than 1.
%H A178764 T. D. Noe, <a href="/A178764/b178764.txt">Table of n, a(n) for n=1..10000</a>
%H A178764 Florian Luca, Carl Pomerance, and Stephen Wagner, <a href="http://www.math.dartmouth.edu/~carlp/fibinttalk.pdf">Fibonacci Integers (preprint)</a>
%F A178764 a(n) = A061446(n) / A178763(n).
%K A178764 nonn
%O A178764 1,6
%A A178764 _T. D. Noe_, Jun 10 2010