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Primes of the form ChebyshevT[8,n].
5

%I #7 Aug 13 2024 22:54:27

%S 665857,7380481,708158977,325142092801,1401864610177,2161873163521,

%T 448940843963137,1494471913541377,2563669662007681,3045085994259457,

%U 27932995018647937,115054894682275201,128098973812320001

%N Primes of the form ChebyshevT[8,n].

%H Robert Israel, <a href="/A144132/b144132.txt">Table of n, a(n) for n = 1..10000</a>

%p select(isprime, [seq(128*x^8 - 256*x^6 + 160*x^4 - 32*x^2 + 1,x=1..100)]); # _Robert Israel_, Aug 13 2024

%t lst={};Do[p=ChebyshevT[8,n];If[PrimeQ[p],AppendTo[lst,p]],{n,9^3}];lst

%K nonn

%O 1,1

%A _Vladimir Joseph Stephan Orlovsky_, Sep 11 2008