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A058586 Numbers n such that 5*2^n + 3 is prime. 1
1, 2, 3, 4, 5, 7, 8, 11, 12, 18, 20, 26, 28, 32, 34, 43, 44, 50, 52, 58, 65, 66, 107, 140, 197, 274, 280, 380, 393, 506, 664, 738, 875, 944, 1016, 1547, 1548, 1687, 3938, 4066, 5165, 6258, 6402, 7067, 7413, 7967, 9441, 9922, 11106 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..49.

MATHEMATICA

Do[ If[ PrimeQ[ 5*2^n + 3 ], Print[ n ] ], {n, 1, 10000} ]

PROG

(PARI) is(n)=ispseudoprime(5*2^n+3) \\ Charles R Greathouse IV, Jun 12 2017

CROSSREFS

Cf. A068713(n-1) - 1.

A068713(n-1) + 1.

Sequence in context: A331418 A062890 A259626 * A090467 A177202 A053868

Adjacent sequences:  A058583 A058584 A058585 * A058587 A058588 A058589

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Dec 26 2000

STATUS

approved

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Last modified July 9 22:46 EDT 2020. Contains 335570 sequences. (Running on oeis4.)