%I
%S 2,3,5,6,13,24,66,68,167,287,310,352,564,590,620,849,1552,1849
%N Integers n such that nth primorial minus 1 is prime.
%C a(19) > 25000.  _Robert Price_, Nov 22 2014
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Primorial.html">Primorial</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/IntegerSequencePrimes.html">Integer Sequence Primes</a>
%F a(n) = A000720(A006794(n))
%e 30039=A002110(6)1 is a prime
%Y Cf. A006794, A057705, A014545, A005234, A002110, A057706.
%K nonn,more,changed
%O 1,1
%A _Labos Elemer_, Oct 24 2000
%E Corrected by Holzer Werner, Nov 28 2002
