sawtooth = 0 : [1 - (2 / (fromIntegral _N)) * (fromIntegral x) | x <- [1.._N_Minus1]]
sawtooth = 0 : [1 - (2 / (fromIntegral _N)) * (fromIntegral x) | x <- [1.._N_Minus1]]
sawtooth = 0 : [1 - (2 / (fromIntegral _N)) * (fromIntegral x) | x <- [1.._N_Minus1]]