497689domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = (a(n-1) * a(n-3) - (-1)^n * a(n-2)^2) / a(n-4) with a(1) = a(3) = a(4) = 1, a(2) = -2.at n=17A247378Prime numbersat n=41360