OFFSET
1,1
COMMENTS
a(6) > Fibonacci(1500), if it exists. - Amiram Eldar, Aug 01 2024
EXAMPLE
55 = Fibonacci(10) is a term because 55 = 5 * 11 and 55 + 2 = 57 = 3 * 19 are both squarefree semiprimes.
4181 = Fibonacci(19) is a term because 4181 = 37 * 113 and 4181 + 2 = 4183 = 47 * 89 are both squarefree semiprimes.
MATHEMATICA
Select[Fibonacci[Range[300]], Last/@FactorInteger[#]=={1, 1} && (Last/@FactorInteger[#+2]=={1, 1} || Last/@FactorInteger[#-2]=={1, 1})&]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Joseph Stephan Orlovsky, Feb 03 2012
EXTENSIONS
Name corrected by Amiram Eldar, Aug 01 2024
STATUS
approved