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A225955 Numbers n such that (15^n - 2^n)/13 is prime. 3
2, 5, 11, 167, 317, 337, 349, 3449, 7517, 23003 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All terms are primes.

a(11) > 10^5.

LINKS

Table of n, a(n) for n=1..10.

MATHEMATICA

Select[ Prime[ Range[1, 100000] ], PrimeQ[ (15^# - 2^#)/13 ]& ]

PROG

(PARI) is(n)=ispseudoprime((15^n-2^n)/13) \\ Charles R Greathouse IV, May 22 2017

CROSSREFS

Cf. A128028, A016054, A217320, A006033.

Sequence in context: A239900 A123165 A098438 * A236073 A064772 A107989

Adjacent sequences:  A225952 A225953 A225954 * A225956 A225957 A225958

KEYWORD

more,nonn

AUTHOR

Robert Price, May 21 2013

STATUS

approved

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Last modified May 26 15:50 EDT 2020. Contains 334626 sequences. (Running on oeis4.)