%I A018239
%S A018239 2,3,7,31,211,2311,200560490131,
%T A018239 1719620105458406433483340568317543019584575635895742560438771105058321655238562613083979651479555788009994557\
               822024565226932906295208262756822275663694111
%N A018239 Primorial primes: form product of first k primes and add 1, then reject 
               unless prime.
%D A018239 F. Iacobescu, Smarandache Partition Type and Other Sequences, Bull. Pure 
               Appl. Sciences, Vol. 16E, No. 2 (1997), pp. 237-240.
%D A018239 F. Smarandache, Sequences of Numbers Involved in Unsolved Problems, Hexis, 
               Phoenix, 2006.
%H A018239 M. Fleuren, <a href="http://www.gallup.unm.edu/~smarandache/michafleuren.htm">
               Factors and primes of Smarandache sequences</a>.
%H A018239 M. Fleuren, <a href="http://www.gallup.unm.edu/~smarandache/SmPrimProd.txt">
               Smarandache Prime Product Sequence</a>.
%H A018239 F. Smarandache, <a href="http://www.gallup.unm.edu/~smarandache/Sequences-book.pdf">
               Sequences of Numbers Involved in Unsolved Problems</a>.
%t A018239 Select[FoldList[Times, 1, Prime[Range[200]]] + 1, PrimeQ]. - Loreno Heer 
               (helohe(AT)bluewin.ch), Jun 29 2004
%Y A018239 Primes in A006862 (primorials plus 1).
%Y A018239 A005234 and A014545 (which are the main entries for this sequence) give 
               more terms.
%Y A018239 Cf. A002110.
%Y A018239 Sequence in context: A038710 A073918 A096350 this_sequence A066279 A057677 
               A032148
%Y A018239 Adjacent sequences: A018236 A018237 A018238 this_sequence A018240 A018241 
               A018242
%K A018239 nonn,nice
%O A018239 1,1
%A A018239 Murray Bremner (bremner(AT)snoopy.usask.ca)
%E A018239 Edited by N. J. A. Sloane (njas(AT)research.att.com) at the suggestion 
               of Vladeta Jovovic, Jun 18 2007