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%I #8 Jan 07 2021 21:13:38
%S 2,8,40,208,1200,6528,34048,196608,1112064,6062080,33701888,194871296,
%T 1091371008,5950930944,34801188864,198474465280,1105056497664,
%U 6298980581376,36394596564992,205774030635008,1151529050439680
%N Maximum of the absolute values of the coefficients of P(n,x) where P(n,x) = 4^(n-1)*Product_{k=0..n} (x - cos(k*Pi/n)^2).
%e p(3,x) = 16*x^4 - 40*x^3 + 33*x^2 -10*x + 1, hence a(3)=40.
%K nonn
%O 1,1
%A _Benoit Cloitre_, Oct 22 2002
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