A155037 Numbers n such that n^3+2*n^2+1 is prime.

2, 4, 8, 10, 12, 14, 18, 22, 34, 42, 44, 48, 56, 62, 64, 76, 78, 80, 88, 90, 100, 102, 116, 130, 134, 136, 144, 146, 154, 162, 168, 184, 186, 212, 222, 226, 230, 234, 238, 248, 260, 264, 270, 282, 284, 288, 300, 310, 314, 316, 350, 356, 378, 400, 404, 418, 424

Offset

1,1

Links

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

Example

For n=2, n^3+2*n^2+1=17; n=48, n^3+2*n^2+1=115201.

Mathematica

Select[Range[0, 500], PrimeQ[#^3+2#^2+1]&] (* Vincenzo Librandi, Sep 24 2012 *)

Prog

(Magma) [n: n in [0..450] | IsPrime(n^3+2*n^2+1)]; // Vincenzo Librandi, Sep 24 2012
(PARI) is(n)=isprime(n^3+2*n^2+1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A133012 A039011 A132190 * A001770 A032494 A125953

Adjacent sequences: A155034 A155035 A155036 * A155038 A155039 A155040

Keyword

nonn,easy

Author

Vincenzo Librandi, Jan 19 2009

Status

approved