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A057704
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Integers n such that n-th primorial minus 1 is prime.
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15
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2, 3, 5, 6, 13, 24, 66, 68, 167, 287, 310, 352, 564, 590, 620, 849, 1552, 1849
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Eric Weisstein's World of Mathematics, Primorial
Eric Weisstein's World of Mathematics, Integer Sequence Primes
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FORMULA
| a(n) = A000720(A006794(n))
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EXAMPLE
| 30039=A002110(6)-1 is a prime
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CROSSREFS
| Cf. A006794, A057705, A014545, A005234, A002110, A057706.
Sequence in context: A020473 A098833 A075371 * A078203 A131825 A079226
Adjacent sequences: A057701 A057702 A057703 * A057705 A057706 A057707
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KEYWORD
| nonn,more
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Oct 24 2000
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EXTENSIONS
| Corrected by Holzer Werner, Nov 28, 2002
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