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%I A173929 #3 Sep 08 2022 08:45:51
%S A173929 2,5,7,19,13,71,97,181,3691,2521,191861,489061,6811741,138907099,
%T A173929 708158977,1321442641,26947261171,18405321661,
%U A173929 381765135195632792959100810331957408101589361
%N A173929 Primes in A173299.
%C A173929 a(20) has 84 digits. Most terms of A173299 are nonprime.
%o A173929 (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 A173929 Cf. A173299.
%K A173929 nonn
%O A173929 1,1
%A A173929 _Klaus Brockhaus_, Mar 02 2010

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