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A057704 Integers n such that n-th primorial minus 1 is prime. 16
2, 3, 5, 6, 13, 24, 66, 68, 167, 287, 310, 352, 564, 590, 620, 849, 1552, 1849 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(19) > 25000. - Robert Price, Nov 22 2014

LINKS

Table of n, a(n) for n=1..18.

Eric Weisstein's World of Mathematics, Primorial

Eric Weisstein's World of Mathematics, Integer Sequence Primes

FORMULA

a(n) = A000720(A006794(n))

EXAMPLE

30039=A002110(6)-1 is a prime

CROSSREFS

Cf. A006794, A057705, A014545, A005234, A002110, A057706.

Sequence in context: A098833 A075371 A218948 * A078203 A131825 A222313

Adjacent sequences:  A057701 A057702 A057703 * A057705 A057706 A057707

KEYWORD

nonn,more,changed

AUTHOR

Labos Elemer, Oct 24 2000

EXTENSIONS

Corrected by Holzer Werner, Nov 28 2002

STATUS

approved

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Last modified November 28 16:31 EST 2014. Contains 250364 sequences.