A126422 Primes of the form k^4-k-1.

13, 251, 619, 1289, 2393, 6551, 14629, 28547, 65519, 159979, 279817, 456949, 2313401, 2559959, 3111653, 3748051, 6249949, 7890427, 9150569, 10555943, 12959939, 13845779, 21381307, 25411609, 35152963, 38950001, 45212093

Offset: 1

Author

Artur Jasinski, Dec 26 2006

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A002327, A002328, A116581, A126420, A126421, A126423, A126424.

Programs

Mathematica

a = {}; Do[If[PrimeQ[x^4 - x - 1], AppendTo[a, x^4 - x - 1]], {x, 1, 100}]; a
Select[Table[n^4-n-1,{n,100}],PrimeQ] (* Harvey P. Dale, Aug 27 2013 *)

Formula

a(n) = A126423(A126424(n)). - Amiram Eldar, Mar 13 2020

Extensions

Definition corrected by Charles R Greathouse IV, Mar 11 2008