A199368 Numbers k such that 4k^3 - 3 is prime.

2, 14, 16, 22, 25, 29, 49, 64, 74, 77, 86, 91, 112, 121, 127, 134, 137, 140, 151, 161, 179, 197, 214, 221, 226, 254, 259, 284, 287, 296, 302, 305, 310, 347, 361, 364, 365, 380, 382, 392, 394, 401, 406, 407, 415, 469, 497

Offset: 1

Author

N. J. A. Sloane, Nov 05 2011

Keywords

• nonn
• easy

Comments

See comment in A199307.

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A199307, A199369.

Programs

Magma

[n: n in [1..500] | IsPrime(4*n^3-3)]; // Vincenzo Librandi, Jan 07 2013

Mathematica

Select[Range[600], PrimeQ[4#^3 - 3]&] (* Vincenzo Librandi, Jan 07 2013 *)

PARI

is(n)=isprime(4*n^3-3) \\ Charles R Greathouse IV, May 22 2017