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Search: id:A111937
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| A111937 |
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Integers n such that ceiling(pi^n) is prime. |
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+0
2
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OFFSET
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1,1
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LINKS
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Eric Weisstein's World of Mathematics, Phi-Prime
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EXAMPLE
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a(1)=5: ceiling(3.1415926535897932384626433832795^5) = ceiling(306.01968478528145326274131004344) = 307, which is prime.
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MATHEMATICA
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$MaxExtraPrecision = 2^20; Do[ If[ PrimeQ[ Ceiling[Pi^n]], Print[n]], {n, 10000}] (* Robert G. Wilson v *)
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CROSSREFS
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Sequence in context: A100559 A087348 A050409 this_sequence A139856 A097345 A097344
Adjacent sequences: A111934 A111935 A111936 this_sequence A111938 A111939 A111940
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KEYWORD
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nonn
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AUTHOR
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Ray G. Opao (1260(AT)email.com), Nov 27 2005
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EXTENSIONS
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a(5)-a(7) from Robert G. Wilson v (rgwv(at)rgwv.com), Nov 28 2005
a(8) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Feb 04 2008
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