%I A051915
%S A051915 0,1,2,3,5,12,18,35,51,53,78,209,396,4166
%N A051915 Numbers n such that 2*n! + 1 is a prime.
%C A051915 Used PrimeForm to prove primality for n = 4166 (classical N-1 test) - 
               David Radcliffe (radcl008(AT)umn.edu), May 28 2007
%e A051915 n=5 is here because 2*5!+1=241 is a prime.
%Y A051915 Cf. A051888.
%Y A051915 Sequence in context: A112978 A002139 A140489 this_sequence A064688 A089891 
               A004689
%Y A051915 Adjacent sequences: A051912 A051913 A051914 this_sequence A051916 A051917 
               A051918
%K A051915 nonn
%O A051915 1,3
%A A051915 Labos E. (labos(AT)ana.sote.hu), Dec 18 1999
%E A051915 4166 from David Radcliffe (radcl008(AT)umn.edu), May 28 2007