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Numbers k such that 4k^3 + 3 is prime.
3

%I #20 Sep 08 2022 08:46:00

%S 0,1,5,10,14,20,28,34,38,49,55,59,61,80,98,103,118,133,145,146,154,

%T 160,185,196,206,224,229,241,245,250,251,320,325,334,376,383,385,388,

%U 398,416,418,440,451,454,475,476,481,488,490,493,496,500

%N Numbers k such that 4k^3 + 3 is prime.

%C See comment in A199307.

%H Vincenzo Librandi, <a href="/A199364/b199364.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Range[0,3000],PrimeQ[4#^3+3]&] (* _Vincenzo Librandi_, Aug 01 2012 *)

%o (Magma) [n: n in [0..500] | IsPrime(4*n^3+3)]; // _Bruno Berselli_, Nov 08 2011

%o (PARI) is(n)=isprime(4*n^3+3) \\ _Charles R Greathouse IV_, May 22 2017

%Y Cf. A199307, A199365.

%K nonn,easy

%O 1,3

%A _N. J. A. Sloane_, Nov 05 2011

%E First term added by _Vincenzo Librandi_, Nov 08 2011