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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All terms are odd primes.

a(13) > 10^5.

LINKS

Table of n, a(n) for n=1..12.

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

Cf. A057181, A125956, A125957, A222265.

Sequence in context: A142926 A041983 A263549 * A201857 A294395 A186208

Adjacent sequences:  A225188 A225189 A225190 * A225192 A225193 A225194

KEYWORD

nonn,hard,more

AUTHOR

Robert Price, May 07 2013

EXTENSIONS

Removed incorrect first term of "2".

STATUS

approved

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Last modified October 21 11:42 EDT 2019. Contains 328296 sequences. (Running on oeis4.)