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A059454 Numbers n such that 2*3^n - 7 is prime. 2
0, 2, 3, 5, 6, 9, 14, 39, 51, 73, 101, 155, 183, 286, 291, 310, 313, 335, 570, 951, 1011, 1183, 1930, 2586, 3423, 6486, 7791 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..27.

MATHEMATICA

Do[ If[ PrimeQ[ 2*3^n - 7 ], Print[n] ], {n, 0, 5700} ]

PROG

(PARI) is(n)=ispseudoprime(2*3^n-7) \\ Charles R Greathouse IV, May 22 2017

CROSSREFS

Sequence in context: A295631 A278707 A294631 * A138538 A240555 A102694

Adjacent sequences:  A059451 A059452 A059453 * A059455 A059456 A059457

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Feb 15 2001

STATUS

approved

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Last modified April 20 17:54 EDT 2019. Contains 322310 sequences. (Running on oeis4.)