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Search: id:A076185
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| A076185 |
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Numbers n such that n!!+2 is prime. |
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+0
11
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| 1, 3, 5, 7, 9, 21, 23, 27, 57, 75, 103, 169, 219, 245, 461, 695, 1169, 3597, 3637, 7495
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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The OpenPFGW Project, Primality Tester
C. K. Caldwell, The Prime Glossary, Multifactorial prime
Joe McLean, Interesting Sources of Probable Primes
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MATHEMATICA
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lst={}; Do[If[PrimeQ[n!!+2], AppendTo[lst, n]], {n, 13^3}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 08 2008]
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CROSSREFS
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Cf. A006882, A080778 and A076186, A076188, A076189, A076190, A076193,
A076194, A076195, A076196, A076197 for other values of s in n!!+2^s
Sequence in context: A003052 A003219 A030142 this_sequence A101813 A134719 A099995
Adjacent sequences: A076182 A076183 A076184 this_sequence A076186 A076187 A076188
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KEYWORD
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nonn,more
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Nov 02 2002
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EXTENSIONS
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Edited and extended (n<4096) by Hugo Pfoertner (hugo(AT)pfoertner.org), Jun 19 2003
One more term from Herman Jamke (hermanjamke(AT)fastmail.fm), Dec 30 2007
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