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A225191
Numbers n such that (15^n + 2^n)/17 is prime.
3
3, 67, 199, 479, 563, 2243, 2579, 6599, 7951, 10099, 10909, 13759
OFFSET
1,1
COMMENTS
All terms are odd primes.
a(13) > 10^5.
MATHEMATICA
Select[Prime[Range[1, 100000]], PrimeQ[(15^# + 2^#)/17]&]
PROG
(PARI) forprime(p=3, 10^6, if(ispseudoprime((15^p + 2^p)/17), print1(p, ", ") ) ); \\ Joerg Arndt, Jul 29 2013
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Robert Price, May 07 2013
EXTENSIONS
Removed incorrect first term of "2".
STATUS
approved