OFFSET
1,1
COMMENTS
Conjecture: All numbers in this sequence are products of two sums of two squares, e.g. 4181 = 37*113 = (1^2+6^2)*(7^2+8^2), 1346269 = 557*2417 = (14^2+19^2)*(4^2+49^2).
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..42
MATHEMATICA
k = {}; Do[If[ !PrimeQ[Fibonacci[Prime[n]]], c = Length[FactorInteger[Fibonacci[Prime[n]]]]; If[c == 2, AppendTo[k, Fibonacci[Prime[n]]]]], {n, 1, 50}]; k
Select[Fibonacci[Prime[Range[30]]], PrimeOmega[#]==2&] (* Harvey P. Dale, Feb 18 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Dec 08 2007
STATUS
approved