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%I #9 Jun 26 2014 05:01:39
%S 71,127,139,149,211,241,293,397,401,409,421,479,487,491,499,521,523,
%T 617,661,673,691,701,743,761,773,787,797,809,907,911,967,1049,1061,
%U 1151,1153,1163,1171,1201,1213,1249,1279,1399,1409,1471,1523,1571,1583,1597
%N Primes p such that p+/-6 are semiprimes.
%H K. D. Bajpai, <a href="/A115395/b115395.txt">Table of n, a(n) for n = 1..10000</a>
%e 71-6=65=5*13 (semiprime), 71+6=77=7*11 (semiprime).
%t A115395 = {}; k = Prime[n]; Do[If[PrimeOmega[k + 6] == 2 && PrimeOmega[k - 6] == 2, AppendTo[A115395, k]], {n, 1000}]; A115395 (* _K. D. Bajpai_, Jun 24 2014 *)
%o (PARI) lista(nn) = {pr = primes(nn); pp = select(i->((bigomega(i-6) == 2) && (bigomega(i+6) == 2)), pr); print(pp);} \\ _Michel Marcus_, Oct 09 2013
%Y Cf. A063643 Primes p such that p+/-2 are semiprimes, A117328 Primes p such that p+/-4 are semiprimes.
%K nonn
%O 1,1
%A _Zak Seidov_, Mar 08 2006
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