The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A224796 Pi*n rounded to the nearest integer is prime. 2
 1, 4, 6, 10, 13, 15, 17, 25, 31, 32, 34, 36, 48, 50, 52, 53, 55, 57, 71, 73, 76, 80, 90, 99, 101, 111, 122, 134, 141, 143, 155, 160, 162, 174, 181, 187, 195, 197, 201, 204, 206, 208, 220, 223, 229, 239, 241, 246, 258, 262, 264, 267, 279, 281, 290, 309, 311, 313 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Charles R Greathouse IV, Table of n, a(n) for n = 1..10000 Chris Caldwell and G. L. Honaker, Jr., Prime curio for 15 EXAMPLE a(3)=6 because Pi*6 = 18.849559..., which rounds to 19 (a prime number). PROG (PARI) is(n)=isprime(round(Pi*n)) \\ Charles R Greathouse IV, Apr 18 2013 CROSSREFS Cf. A000040, A000796, A224719. Sequence in context: A086493 A234965 A320881 * A190370 A246439 A186514 Adjacent sequences: A224793 A224794 A224795 * A224797 A224798 A224799 KEYWORD nonn AUTHOR G. L. Honaker, Jr., Apr 18 2013 EXTENSIONS Additional terms from Mike Keith (mikek314(at)gmail.com), Apr 18 2013 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 29 23:48 EDT 2023. Contains 365781 sequences. (Running on oeis4.)