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A059077 Numbers n such that 2*7^n - 3 is prime. 0
1, 3, 4, 7, 132, 253 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..6.

MATHEMATICA

Do[ If[ PrimeQ[ 2*7^n - 3 ], Print[n] ], {n, 1, 6000} ]

PROG

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

CROSSREFS

Sequence in context: A042543 A041987 A100978 * A042707 A229348 A215758

Adjacent sequences:  A059074 A059075 A059076 * A059078 A059079 A059080

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Feb 12 2001

STATUS

approved

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Last modified March 25 12:11 EDT 2019. Contains 321470 sequences. (Running on oeis4.)