Search: id:A116958
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%I A116958
%S A116958 0,3,6,12,18,27,33,48,51,66,72,87,93,96,111,117,132,138,153,171,207,213,
%T A116958 228,258,282,297,306,318,327,402,408,411,426,438,507,513,522,528,543,
%U A116958 573,612,636,642,648,657,711,723,738,741,801,807,831,846,858,891,933
%N A116958 Numbers n such that 2*n + 5 and 2*n + 7 are twin primes.
%C A116958 All n's are multiples of 3 because all twin primes except (3,5) are of 
               the form (6n-1,6n+1). - Jonathan Vos Post Mar 31 2006
%H A116958 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               TwinPrimes.html">Twin Primes.</a>
%t A116958 Reap[Do[If[PrimeQ[2n+5]&&PrimeQ[2n+7],Sow[n]],{n,0,1000}]][[2,1]]
%Y A116958 a(n)=3*A002822(n-1).
%Y A116958 Sequence in context: A028882 A154907 A024513 this_sequence A006156 A061776 
               A074899
%Y A116958 Adjacent sequences: A116955 A116956 A116957 this_sequence A116959 A116960 
               A116961
%K A116958 nonn
%O A116958 1,2
%A A116958 Zak Seidov (zakseidov(AT)yahoo.com), Mar 30 2006

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