A method of designing a logic circuit based on one of the functions of the form fn=x1 (x2 & (x3 (x4 & . . . xn . . . ))) and f′n=x1 & (x2 (x3 & (x4 . . . xn . . . ))), by (a) selecting n as the number of variables of the logic circuit, (b) testing n against a threshold, (c) for values of n less than the threshold, using a first algorithm to design the logic circuit, (d) for values of n greater than the threshold, using a second algorithm to design the logic circuit.