OFFSET
1,6
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..1122
EXAMPLE
a(12) = 4 because Jacobsthal(12) = 1365 has prime factors {3, 5, 7, 13}.
CROSSREFS
KEYWORD
nonn
AUTHOR
Sean A. Irvine, Oct 21 2023
STATUS
approved