OFFSET
1,1
COMMENTS
All terms are prime.
PROG
(PARI) is(n)=ispseudoprime((18^n+17^n)/35) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
hard,nonn,more
AUTHOR
Jean-Louis Charton, Jul 03 2013
EXTENSIONS
a(7), a(8) from Richard Fischer, Aug 18 2013
a(9) from Robert Price, Aug 25 2013
STATUS
approved