while True: try: num = int(input()) s = 1 t = [] for i in range(num): s = s + 2 * i t.append(str(s)) for i in range(num-1): s = s+2 t[0] = t[0] + '+' + str(s) print(t[0]) except: break
第一个奇数为1 + 2X0 + 2X1 + … + 2X(num-1)
while True: try: num = int(input()) s = 1 t = [] for i in range(num): s = s + 2 * i t.append(str(s)) for i in range(num-1): s = s+2 t[0] = t[0] + '+' + str(s) print(t[0]) except: break
第一个奇数为1 + 2X0 + 2X1 + … + 2X(num-1)