第4次做第6章

def getPentagonalNumber(n):
    count = 0
    for i in range(1, n):
        count += 1
        pen_num = round(i * ((3 * i) - 1) / 2)
        print(f"{pen_num}", end=" ")
        if count % 10 == 0:
            print()


getPentagonalNumber(100)