A141400 Numbers k such that 16*k^4 + 81 is prime.

1, 2, 4, 8, 10, 13, 17, 19, 23, 34, 38, 43, 49, 50, 53, 55, 59, 64, 74, 77, 79, 85, 94, 109, 115, 121, 127, 128, 136, 137, 145, 146, 151, 157, 163, 166, 169, 181, 187, 188, 194, 200, 203, 205, 214, 217, 223, 227, 232, 239, 244, 265, 283, 302, 314, 316, 319, 331

Offset

1,2

Links

Table of n, a(n) for n=1..58.

Mathematica

Select[Range[400], PrimeQ[16 #^4+81]&] (* Harvey P. Dale, Jan 22 2014 *)

Prog

(Magma) [n: n in [0..5000] |IsPrime(16*n^4+81)] // Vincenzo Librandi, Nov 25 2010
(PARI) is(n)=isprime(16*n^4+81) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A075333 A297250 A014190 * A190744 A190751 A030232

Adjacent sequences: A141397 A141398 A141399 * A141401 A141402 A141403

Keyword

easy,nonn

Author

James R. Buddenhagen, Aug 03 2008

Extensions

More terms from Vincenzo Librandi, Mar 25 2010

Status

approved