OFFSET
1,1
COMMENTS
All terms are prime.
PROG
(PARI) is(n)=ispseudoprime((138^n+137^n)/275) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
hard,nonn,more
AUTHOR
Jean-Louis Charton, Jul 03 2013
EXTENSIONS
a(8) from Tyler Busby, Mar 19 2023
STATUS
approved