OFFSET
1,1
COMMENTS
All terms are primes.
a(9) > 10^5. - Robert Price, Jul 21 2013
MATHEMATICA
k=19; Do[ p=Prime[n]; f=(3^p+k^p)/(k+3); If[ PrimeQ[f], Print[p]], {n, 1, 9592} ]
PROG
(PARI) is(n)=isprime((3^n+19^n)/22) \\ Charles R Greathouse IV, Feb 17 2017
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Alexander Adamchuk, Feb 14 2007
EXTENSIONS
a(5)-a(8) from Robert Price, Jul 21 2013
STATUS
approved