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%I #25 Apr 03 2023 10:36:13
%S 1,4,6,10,13,15,17,25,31,32,34,36,48,50,52,53,55,57,71,73,76,80,90,99,
%T 101,111,122,134,141,143,155,160,162,174,181,187,195,197,201,204,206,
%U 208,220,223,229,239,241,246,258,262,264,267,279,281,290,309,311,313
%N Pi*n rounded to the nearest integer is prime.
%H Charles R Greathouse IV, <a href="/A224796/b224796.txt">Table of n, a(n) for n = 1..10000</a>
%H Chris Caldwell and G. L. Honaker, Jr., <a href="https://t5k.org/curios/page.php?curio_id=25961">Prime curio for 15</a>
%e a(3)=6 because Pi*6 = 18.849559..., which rounds to 19 (a prime number).
%o (PARI) is(n)=isprime(round(Pi*n)) \\ _Charles R Greathouse IV_, Apr 18 2013
%Y Cf. A000040, A000796, A224719.
%K nonn
%O 1,2
%A _G. L. Honaker, Jr._, Apr 18 2013
%E Additional terms from Mike Keith (mikek314(at)gmail.com), Apr 18 2013
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