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A225097 Numbers n such that (13^n + 12^n)/25 is prime. 4
3, 11, 13, 43, 67, 109, 15101, 43997 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All terms are prime.

a(9) > 10^5.

LINKS

Table of n, a(n) for n=1..8.

MATHEMATICA

Select[ Prime[ Range[1, 100000] ], PrimeQ[ (13^# + 12^#)/25 ]& ]

PROG

(PARI) is(n)=ispseudoprime((13^n+12^n)/25) \\ Charles R Greathouse IV, May 22 2017

CROSSREFS

Cf. A057179, A128071, A128342, A213216, A224984.

Sequence in context: A181086 A274343 A113049 * A079665 A281728 A083992

Adjacent sequences:  A225094 A225095 A225096 * A225098 A225099 A225100

KEYWORD

hard,nonn,more

AUTHOR

Robert Price, Apr 27 2013

STATUS

approved

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Last modified August 18 20:02 EDT 2019. Contains 326109 sequences. (Running on oeis4.)