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A088175 Primes such that the next two primes are a twin prime pair. 4

%I #31 Sep 08 2022 08:45:11

%S 2,3,7,13,23,37,53,67,97,103,131,139,173,181,193,223,233,263,277,307,

%T 337,409,421,457,509,563,593,613,631,653,797,811,823,853,877,1013,

%U 1021,1039,1051,1087,1129,1223,1259,1283,1297,1307,1423,1447,1471,1483,1601

%N Primes such that the next two primes are a twin prime pair.

%C Primes p such that nextprime(p) + 2 is prime. - _Irina Gerasimova_, Jun 28 2013

%H Amiram Eldar, <a href="/A088175/b088175.txt">Table of n, a(n) for n = 1..10000</a>

%p A088175 := proc(n)

%p prevprime(A001359(n)) ;

%p end proc:

%p seq(A088175(n),n=1..30) ; # _R. J. Mathar_, Nov 26 2014

%t fQ[n_]:=PrimeQ[NextPrime[n]+2];Select[Prime@Range@500,fQ] (* _Vladimir Joseph Stephan Orlovsky_, Apr 16 2011 *)

%o (PARI) is(n)=isprime(n) && isprime(nextprime(n+1)+2) \\ _Charles R Greathouse IV_, Jun 28 2013

%o (Magma) [NthPrime(n): n in [1..260] | NthPrime(n+2)-NthPrime(n+1) eq 2]; // _Vincenzo Librandi_, Nov 18 2014

%Y Cf. A088176.

%K easy,nonn

%O 1,1

%A _Zak Seidov_, Sep 22 2003

%E More terms from _Ray Chandler_, Sep 25 2003

%E Definition clarified by _Irina Gerasimova_, Jun 28 2013

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Last modified April 16 05:35 EDT 2024. Contains 371697 sequences. (Running on oeis4.)