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Search: id:A050808
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| A050808 |
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Numbers n such that floor(exp(n)) is prime. |
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+0
6
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| 1, 2, 18, 50, 127, 141, 267, 310, 2290, 4487, 5391, 14025
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Eric Weisstein's World of Mathematics, e-Prime
Eric Weisstein's World of Mathematics, e-Prime
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MATHEMATICA
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Do[ If[ PrimeQ[ Floor[ \[ExponentialE]^n] ], Print[n] ], {n, 0, 4750} ]
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CROSSREFS
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Cf. A050809 (the actual primes), A000149, A040016, A037028, A000227, A004791.
Cf. A059791, A059792.
Sequence in context: A052681 A048910 A077591 this_sequence A058653 A058794 A121670
Adjacent sequences: A050805 A050806 A050807 this_sequence A050809 A050810 A050811
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KEYWORD
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nonn,hard
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1999.
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EXTENSIONS
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Corrected by Naohiro Nomoto (6284968128(AT)geocities.co.jp), Feb 22 2001
More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Feb 24 2001; and from Robert G. Wilson v (rgwv(AT)rgwv.com), May 09 2001
a(11) = 5391 from Eric Weisstein (eric(AT)weisstein.com), May 1, 2006
14025 from Donovan Johnson (donovan.johnson(AT)yahoo.com), Feb 04 2008
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