The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A063910 Primes p such that 2*p - 7 is also prime. 3
 5, 7, 13, 19, 37, 43, 67, 73, 79, 103, 109, 139, 157, 193, 223, 277, 307, 313, 349, 367, 373, 379, 397, 409, 433, 457, 463, 487, 499, 523, 547, 619, 643, 727, 733, 739, 769, 787, 853, 877, 883, 919, 937, 997, 1009, 1069, 1093, 1123, 1129, 1237 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All terms > 5 are == 1 (mod 6). - Zak Seidov, Jan 07 2014 LINKS Harry J. Smith, Table of n, a(n) for n = 1..1000 FORMULA A089192 INTERSECT A000040. - R. J. Mathar, Mar 23 2017 MATHEMATICA Select[Prime[Range[2, 2000]], PrimeQ[2 # - 7]&] (* Vincenzo Librandi, Feb 02 2014 *) PROG (PARI) { n=0; p=1; for (m=1, 10^9, p=nextprime(p+1); if (isprime(2*p - 7), write("b063910.txt", n++, " ", p); if (n==1000, break)) ) } \\ Harry J. Smith, Sep 02 2009 (Magma) [n: n in [3..2000] | IsPrime(n) and IsPrime(2*n-7)]; // Vincenzo Librandi, Feb 02 2014 CROSSREFS Sequence in context: A297674 A072677 A117249 * A288632 A189557 A045444 Adjacent sequences: A063907 A063908 A063909 * A063911 A063912 A063913 KEYWORD easy,nonn AUTHOR N. J. A. Sloane, Aug 31 2001 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 9 19:47 EDT 2024. Contains 375765 sequences. (Running on oeis4.)