Search: id:A053182
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%I A053182
%S A053182 2,3,5,17,41,59,71,89,101,131,167,173,293,383,677,701,743,761,773,827,
%T A053182 839,857,911,1091,1097,1163,1181,1193,1217,1373,1427,1487,1559,1583,
%U A053182 1709,1811,1847,1931,1973,2129,2273,2309,2339,2411,2663,2729,2789,2957
%N A053182 Primes p such that p^2+p+1 is prime.
%C A053182 Starting with a(3)=5 all terms are of the form 6k-1,k=1,3,7,10,12,15,
               17,22,28,29,49,64,113,117,124,127,129,138,140,143,152,182,183,194,
               197,199,203,229,238,248,260,264,285,302,.. [From Zak Seidov (zakseidov(AT)yahoo.com), 
               Nov 10 2008]
%H A053182 T. D. Noe, <a href="b053182.txt">Table of n, a(n) for n=1..1000</a>
%t A053182 f[n_]:=1+n+n^2; lst={};Do[p=Prime[n];If[PrimeQ[f[p]],AppendTo[lst,p]],
               {n,6!}];lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jul 
               24 2009]
%Y A053182 Cf. A053184, A065508, A091567
%Y A053182 Sequence in context: A077498 A118958 A163588 this_sequence A076706 A019350 
               A103074
%Y A053182 Adjacent sequences: A053179 A053180 A053181 this_sequence A053183 A053184 
               A053185
%K A053182 easy,nonn
%O A053182 1,1
%A A053182 Enoch Haga (Enokh(AT)comcast.net), Mar 01 2000

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