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 A111937 Integers n such that ceiling(pi^n) is prime. 1
 5, 29, 88, 948, 1071, 1100, 1578, 14357 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Eric Weisstein's World of Mathematics, Phi-Prime EXAMPLE a(1)=5: ceiling(3.1415926535897932384626433832795^5) = ceiling(306.01968478528145326274131004344) = 307, which is prime. MATHEMATICA \$MaxExtraPrecision = 2^20; Do[ If[ PrimeQ[ Ceiling[Pi^n]], Print[n]], {n, 10000}] (* Robert G. Wilson v *) CROSSREFS Sequence in context: A236075 A272650 A050409 * A215850 A190585 A197276 Adjacent sequences:  A111934 A111935 A111936 * A111938 A111939 A111940 KEYWORD nonn AUTHOR Ray G. Opao, Nov 27 2005 EXTENSIONS a(5)-a(7) from Robert G. Wilson v, Nov 28 2005 a(8) from Donovan Johnson, Feb 04 2008 STATUS approved

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Last modified January 17 22:51 EST 2019. Contains 319251 sequences. (Running on oeis4.)