267601933domain: NPropertiesPrimalityPrimeyesAppears in sequencesQuartic product sequence: a(n) = Product_{k=1..(n-1)/2} (1 + m*cos(k*Pi/n)^2 + q*cos(k*Pi/n)^4), with m=12 and q = 3*4^3.at n=13A152096Prime numbersat n=14587936