Search: id:A065017
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%I A065017
%S A065017 23,47,167,359,1847,3719,10607,19319,97967,177239,273527,657719,
%T A065017 1042439,1104599,1329407,1515359,1745039,2042039,4464767,5013119,
%U A065017 5148359,9740639,11095559,11377127,12538679,16024007,16410599,16752647
%N A065017 p*q + p + q is prime, where (p, q=p+2) are twin primes.
%C A065017 The resulting prime can never be a twin prime since the odd number preceding 
               it is divisible by three and the following odd number is a perfect 
               square.
%H A065017 Harry J. Smith, <a href="b065017.txt">Table of n, a(n) for n=1,...,1000</
               a>
%F A065017 p^2+4*p+2.
%e A065017 (3*5) + (3+5) = 23
%t A065017 NextPrim[n_] := Block[ {k = n + 1}, While[ !PrimeQ[k], k++ ]; Return[k]]; 
               k = 1; Do[k = NextPrim[k]; If[ PrimeQ[k + 2], p = k*(k + 2) + 2k 
               + 2; If[ PrimeQ[p], Print[p]]], {n, 1, 700} ]
%o A065017 (PARI) { n=p=0; for (m=1, 10^9, p=nextprime(p + 1); if (isprime(q=p + 
               2) && isprime(a=p*q + p + q), write("b065017.txt", n++, " ", a); 
               if (n==1000, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), 
               Oct 03 2009]
%Y A065017 A049001, A049002
%Y A065017 Sequence in context: A042050 A139857 A139900 this_sequence A140618 A042052 
               A136030
%Y A065017 Adjacent sequences: A065014 A065015 A065016 this_sequence A065018 A065019 
               A065020
%K A065017 nonn
%O A065017 1,1
%A A065017 Stephan Wagler (stephanwagler(AT)aol.com), Nov 01 2001
%E A065017 OFFSET changed from 0,1 to 1,1 by Harry J. Smith (hjsmithh(AT)sbcglobal.net), 
               Oct 03 2009

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