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%I #18 Jun 14 2017 01:06:47
%S 2,3,19,29,43,59,71,79,89,109,113,127,137,139,149,163,179,181,197,199,
%T 211,229,239,241,269,281,283,293,313,317,337,349,359,379,389,397,401,
%U 409,419,421,431,439,449,463,467,479,487,491,499,509,521,523,547,569
%N Primes p such that p + 6 is not a prime.
%C Note that if Goldbach's Conjecture (2n = p1 + p2 for all n>=2) is false and K is the smallest value of n for which it fails, then for 2(K-3) = p3 + p4, the primes p3 and p4 must be taken from this list. See also A067775. - Keith Backman, Apr 05 2012
%H Zak Seidov, <a href="/A140555/b140555.txt">Table of n, a(n) for n = 1..10000</a>
%F A000040 SET MINUS A023201. - _R. J. Mathar_, Aug 09 2008
%t Select[Prime[Range[200]],!PrimeQ[#+6]&] (* _Harvey P. Dale_, Dec 21 2016 *)
%o (PARI) forprime(p=2,600,if(!isprime(p+6),print1(p,","))) \\ _Klaus Brockhaus_, Aug 12 2008
%Y Cf. A000040, A023201, A067775.
%K nonn
%O 1,1
%A _Juri-Stepan Gerasimov_, Jul 03 2008
%E Corrected by _R. J. Mathar_ and _Klaus Brockhaus_, Aug 12 2008
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