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A059326 Numbers n such that 2*3^n + 7 is prime. 0
1, 3, 9, 11, 15, 17, 24, 41, 68, 72, 641, 716, 1139, 1200, 1661, 3339, 5181 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..17.

MATHEMATICA

Do[ If[ PrimeQ[ 2*3^n + 7 ], Print[n] ], {n, 0, 10000} ]

PROG

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

CROSSREFS

Sequence in context: A075720 A106373 A190226 * A028312 A310315 A074486

Adjacent sequences:  A059323 A059324 A059325 * A059327 A059328 A059329

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Feb 15 2001

STATUS

approved

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Last modified June 17 19:10 EDT 2019. Contains 324198 sequences. (Running on oeis4.)