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A128341 Numbers n such that (12^n + 5^n)/17 is prime. 18
3, 5, 13, 347, 977, 1091 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

All terms are primes.

MATHEMATICA

k=12; Do[p=Prime[n]; f=(k^p+5^p)/(k+5); If[ PrimeQ[f], Print[p] ], {n, 1, 100}]

CROSSREFS

Cf. A057171, A082387, A122853, A128335, A128336, A128337, A128338, A128339, A128340, A128342, A128343. Cf. A004061, A082182, A121877, A059802. Cf. A062572, A128344, A128345, A128346, A128347, A128348, A128349, A128350, A128351, A128352, A128353, A128354.

Sequence in context: A110407 A062698 A200769 * A177007 A028942 A179213

Adjacent sequences:  A128338 A128339 A128340 * A128342 A128343 A128344

KEYWORD

hard,more,nonn

AUTHOR

Alexander Adamchuk (alex(AT)kolmogorov.com), Feb 27 2007

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Last modified February 14 10:01 EST 2012. Contains 205614 sequences.