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A057704 Integers n such that n-th primorial minus 1 is prime. 16

%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 n-th 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

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Last modified November 28 13:03 EST 2014. Contains 250359 sequences.