OFFSET
1,4
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..262
EXAMPLE
a(0)=a(1)=0 because the first two nonzero octanacci numbers are both 1, which has zero prime divisors.
a(2)=1 because the 3rd nonzero octanacci number is 2, a prime, with only one prime divisor.
a(3)=2 because the 4th nonzero octanacci number is 4 = 2^2 which has (with multiplicity) 2 prime divisors (which happen to be equal).
a(4)=3 because the 5th nonzero octanacci number is 8 = 2^3.
a(10)=3 because A079262(10) = 255 = 3 * 5 * 17 which has 3 prime factors.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Mar 06 2005
EXTENSIONS
Offset corrected and more terms added by Amiram Eldar, Sep 08 2019
STATUS
approved