A126435 Primes of the form n^7-n-1.

2097143, 1801088519, 21869999969, 42618442943, 78364164059, 137231006639, 194754273839, 435817657169, 678223072799, 1174711139783, 1727094849479, 3938980639103, 4398046511039, 4902227890559, 6722988818363, 19203908986079

Offset

1,1

Comments

All terms end in 3 or 9. - Robert Israel, Jul 22 2019

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

map(t -> t^7-t-1, select(t -> isprime(t^7-t-1), [$1..10^4])); # Robert Israel, Jul 22 2019

Mathematica

k = 7; a = {}; Do[If[PrimeQ[x^k - x - 1], AppendTo[a, x^k - x - 1]], {x, 1, 100}]; a
Select[Table[n^7-n-1, {n, 80}], PrimeQ] (* Harvey P. Dale, Jun 20 2020 *)

Crossrefs

Cf. A002327, A002328, A116581, A126420, A126421, A126422, A126423, A126424, A126425, A126426, A126427, A126427, A126428, A126429, A126430, A126431, A126432 A126433, A126434.

Sequence in context: A353346 A234420 A115505 * A011571 A022537 A195236

Adjacent sequences: A126432 A126433 A126434 * A126436 A126437 A126438

Keyword

nonn

Author

Artur Jasinski, Dec 26 2006

Status

approved