A073573 Numbers n such that n^3 + 4 is prime.

1, 3, 7, 9, 19, 25, 27, 45, 63, 69, 79, 85, 87, 99, 103, 109, 115, 117, 129, 133, 145, 169, 175, 183, 195, 207, 235, 277, 279, 283, 289, 295, 337, 343, 345, 355, 357, 363, 379, 469, 487, 495, 507, 519, 525, 529, 535, 537, 555, 559, 579, 645, 657, 663, 679, 703, 715, 717, 777, 783

Offset: 1

Author

Zak Seidov, Sep 01 2002

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A067200 (n^3+2 is prime).

Programs

Magma

[n: n in [0..1000]|IsPrime(n^3+4)]; // Vincenzo Librandi, Dec 16 2010

Mathematica

Select[ Range[ 550 ], PrimeQ[ #^3+4 ] & ]

PARI

is(n)=isprime(n^3+4) \\ Charles R Greathouse IV, Feb 20 2017

Extensions

Corrected by Zak Seidov, Aug 31 2006

More terms from Vincenzo Librandi, Dec 16 2010