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A063913 Numbers n such that n and 2n-13 are primes. 12
13, 37, 43, 61, 97, 103, 127, 163, 181, 193, 211, 223, 277, 307, 313, 337, 373, 421, 433, 523, 541, 571, 607, 613, 631, 733, 751, 811, 853, 877, 883, 907, 937, 1021, 1033, 1051, 1063, 1087, 1117, 1153, 1201, 1303, 1381, 1423, 1483, 1531 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harry J. Smith, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Prime[Range[5, 2000]], PrimeQ[2 # - 13]&] (* Vincenzo Librandi, Feb 02 2014 *)

PROG

(PARI) { n=0; p=1; for (m=1, 10^9, p=nextprime(p+1); if (isprime(2*p - 13), write("b063913.txt", n++, " ", p); if (n==1000, break)) ) } \\ Harry J. Smith, Sep 02 2009

(MAGMA) [n: n in [6..2000] | IsPrime(n) and IsPrime(2*n-13)]; // Vincenzo Librandi, Feb 02 2014

CROSSREFS

Sequence in context: A280997 A185006 A285887 * A119705 A155560 A217734

Adjacent sequences:  A063910 A063911 A063912 * A063914 A063915 A063916

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Aug 31 2001

STATUS

approved

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Last modified August 22 02:44 EDT 2019. Contains 326169 sequences. (Running on oeis4.)