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A134916 Numbers n such that both 3^n+2 and 2^n+3 are primes. 4
1, 2, 3, 4, 15 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Intersection of A057732 and A051783. a(6)>1000.

Since this is the intersection of A057732 and A051783, a(6)>95504. - Dmitry Kamenetsky, Jul 29 2008

LINKS

Table of n, a(n) for n=1..5.

MATHEMATICA

Select[Range[20], AllTrue[{3^#+2, 2^#+3}, PrimeQ]&] (* Harvey P. Dale, Sep 02 2022 *)

PROG

(PARI) for(n=0, 1000, if(isprime(2^n+3)&&isprime(3^n+2), print(n)))

CROSSREFS

Cf. A051783, A057732.

Sequence in context: A140047 A297840 A102483 * A085100 A337117 A204983

Adjacent sequences: A134913 A134914 A134915 * A134917 A134918 A134919

KEYWORD

more,nonn

AUTHOR

Zak Seidov, Jan 29 2008

STATUS

approved

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Last modified December 6 07:59 EST 2022. Contains 358605 sequences. (Running on oeis4.)