If 20 is represented as the sum of several different odd numbers, then how many different representation methods are there? (The addends are the same, but the order of addition is different, and they are counted as the same representation. For example, 1+19 and 19+1 are counted as the same representation.)
若将20表示成若干个互不相同的奇数的和，那么，不同的表示方法有多少种．(加数相同，相加的次序不同，算作同一种表示方法．如1+19与19+1算作同一种表示方法．)
<result>7</result>