OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..88
Blair Kelly, Fibonacci and Lucas Factorizations.
EXAMPLE
a(1)=20 because the 20th Fibonacci number consists of 4 distinct prime factors (i.e., 6765 = 3 x 5 x 11 x 41).
PROG
(PARI) n=1; while(n<350, if(omega(fibonacci(n))==4, print1(n, ", ")); n++)
CROSSREFS
KEYWORD
nonn
AUTHOR
Shyam Sunder Gupta, Feb 19 2006
EXTENSIONS
More terms from Ryan Propper, Apr 26 2006
a(56)-a(81) from Max Alekseyev, Aug 18 2013
STATUS
approved