Quartic product sequence: a(n) = Product_{k=1..floor((n-1)/2)} (1 + m*cos(k*Pi/n)^2 + q*cos(k*Pi/n)^4 ), with m = 2*4, q=2*4^3.

A152094

Quartic product sequence: a(n) = Product_{k=1..floor((n-1)/2)} (1 + m*cos(k*Pi/n)^2 + q*cos(k*Pi/n)^4 ), with m = 2*4, q=2*4^3.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =11a(4) =37a(5) =179a(6) =869a(7) =3683a(8) =18389a(9) =80179a(10) =385029a(11) =1739651a(12) =8134709a(13) =37397203a(14) =173097317a(15) =799986979a(16) =3694294933a(17) =17085418099a(18) =78904394437a(19) =364797113027

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