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A173929 Primes in A173299. 0

%I

%S 2,5,7,19,13,71,97,181,3691,2521,191861,489061,6811741,138907099,

%T 708158977,1321442641,26947261171,18405321661,

%U 381765135195632792959100810331957408101589361

%N Primes in A173299.

%C a(20) has 84 digits. Most terms of A173299 are nonprime.

%o (MAGMA) Z<x>:=PolynomialRing(Integers()); N<r>:=NumberField(2*x^2-2*x-1); S:=[ r^n+(1-r)^n: n in [1..300] ]; [ k: j in [1..#S] | IsPrime(k) where k is Numerator(RationalField()!S[j])];

%Y Cf. A173299.

%K nonn

%O 1,1

%A _Klaus Brockhaus_, Mar 02 2010

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Last modified July 20 11:28 EDT 2019. Contains 325180 sequences. (Running on oeis4.)