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A177017 Primes prime(n) such that prime(n) + prime(n+1) + 1 is also prime. 6
5, 7, 13, 17, 19, 23, 29, 37, 47, 53, 67, 79, 83, 97, 103, 109, 113, 131, 137, 163, 173, 181, 197, 227, 229, 251, 257, 269, 283, 293, 307, 313, 359, 383, 389, 401, 409, 421, 439, 449, 457, 467, 479, 491, 503, 509, 587, 593, 599, 613, 617, 643, 647, 659, 677 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Prime[Range[200]], PrimeQ[#+NextPrime[#]+1]&] (* Vincenzo Librandi, Aug 26 2012 *)

Transpose[Select[Partition[Prime[Range[300]], 2, 1], PrimeQ[Total[#]+1]&]][[1]] (* Harvey P. Dale, Apr 16 2013 *)

PROG

(MAGMA) [NthPrime(n): n in [1..200] | IsPrime(NthPrime(n)+NthPrime(n+1)+1)]; // Vincenzo Librandi, Aug 26 2012

CROSSREFS

Cf. A072666, A072667.

Sequence in context: A038988 A033560 A092551 * A136089 A337811 A040995

Adjacent sequences:  A177014 A177015 A177016 * A177018 A177019 A177020

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, May 22 2010

EXTENSIONS

Edited and corrected by N. J. A. Sloane, Jun 22 2010

STATUS

approved

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Last modified October 26 22:19 EDT 2021. Contains 348269 sequences. (Running on oeis4.)