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Primes of the form Phi(k, -8), where Phi is the cyclotomic polynomial.
1

%I #9 Nov 11 2019 13:48:09

%S 73,18837001,262657,77158673929,5302306226370307681801,

%T 6113142872404227834840443898241613032969,

%U 9368364192635570536820270641094526818432914571726884941545525447306194544364947298173904481801

%N Primes of the form Phi(k, -8), where Phi is the cyclotomic polynomial.

%H Robert Price, <a href="/A291992/b291992.txt">Table of n, a(n) for n = 1..9</a>

%H Yves Gallot, <a href="http://yves.gallot.pagesperso-orange.fr/papers/cyclotomic.html">Cyclotomic polynomials and prime numbers</a>

%H <a href="/index/Cy#CyclotomicPolynomialsValuesAtX">Index entries for cyclotomic polynomials,values at X</a>

%t Select[Table[Cyclotomic[k,-8], {k, 3, 100}], PrimeQ[#] &]

%Y Cf. A138922.

%K nonn

%O 1,1

%A _Robert Price_, Sep 07 2017