OFFSET
2,1
COMMENTS
F(n)-1 is even if n is not a multiple of 3.
LINKS
Amiram Eldar, Table of n, a(n) for n = 2..934 (terms 2..379 from Chai Wah Wu)
MATHEMATICA
Table[FactorInteger[Fibonacci[3n]-1][[1, 1]], {n, 2, 80}] (* Harvey P. Dale, Aug 08 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
M. F. Hasler, Apr 05 2008
STATUS
approved