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%I #9 Jul 03 2017 02:13:04
%S 5,6,9,10,11,12,17,18,23,36,48,62,87,112,131,400,1606,6136,6519,11700
%N Numbers n such that primorial(n)/2 - 512 is prime.
%C a(21) > 25000. - _Robert Price_, Jul 02 2017
%t k = 1; a = {}; Do[k = k*Prime[n]; If[PrimeQ[k - 512]&&k>512, Print[n]; AppendTo[a, n]], {n, 2, 325}]; a (* corrected by _Ray Chandler_, Jun 16 2013 *)
%Y Cf. A067026, A067027, A139439-A139457, A103514.
%K nonn
%O 1,1
%A _Artur Jasinski_, Apr 21 2008
%E Dropped 2 and a(16)-a(17) from _Ray Chandler_, Jun 16 2013
%E a(18)-a(20) from _Robert Price_, Jul 02 2017
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