题目

As students, you may have many dreams. They can be very big like becoming Superman, or they can be small. You may just want to become one of the ten best students in your class.  If you find a dream, what do you do with it? Do you ever try to make your dream come true?     Follow Your Heart by Australian writer Andrew Matthews tells us that making our dreams come true is life’s biggest challenge.       “You may think you’re not very good at some school subjects, or that it is impossible (不可能) for you to become a star. These ideas stop you from getting your dream已知实数数列{an}中，a1=1，a6=32，，把数列{an}的各项排成如右图的三角形状．记A（m，n）为第m行从左起第n个数，则若A（m，n）•A（n，m）=250，则m+n=    ．