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A059528 Numbers n such that (7*3^n + 5)/2 is prime. 0
1, 3, 5, 15, 21, 27, 65, 191, 327, 371, 575, 1895, 2375, 2607 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

MATHEMATICA

Do[ If[ PrimeQ[ (7*3^n + 5)/2 ], Print[n] ], {n, 0, 5300} ]

PROG

(PARI) is(n)=ispseudoprime((7*3^n+5)/2) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A208854 A165260 A201874 * A070079 A142717 A057742

Adjacent sequences:  A059525 A059526 A059527 * A059529 A059530 A059531

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Feb 16 2001

STATUS

approved

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Last modified July 21 21:14 EDT 2019. Contains 325199 sequences. (Running on oeis4.)