Search: id:A051507
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%I A051507
%S A051507 3,5,7,13,19,67,149,179,229,239,241,269,277,307,313,397,401,419,439,
%T A051507 487,569,613,643,701,823,863,887,1051,1289,1319,1489,1609,1693,1783,
%U A051507 1873,1999,2143,2239,2309,2423,2539,2549,2593,2617,2729,2753,2819
%N A051507 Primes p such that p*q+2 is prime, where q is next prime after p.
%t A051507 ct = 0; Do[If[PrimeQ[Prime[k]*Prime[k + 1] + 2], ct++; n[ct] = Prime[k]], 
               {k, 1, 640}]; Table[n[k], {k, 1, ct}] (Lei Zhou)
%Y A051507 Cf. A048880.
%Y A051507 Sequence in context: A084696 A093326 A154700 this_sequence A060274 A005235 
               A107664
%Y A051507 Adjacent sequences: A051504 A051505 A051506 this_sequence A051508 A051509 
               A051510
%K A051507 nonn
%O A051507 1,1
%A A051507 N. J. A. Sloane (njas(AT)research.att.com).

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