1,3,5,4,9,5,13,6,(),(),(),()找规律填数

问题描述:

1,3,5,4,9,5,13,6,(),(),(),()找规律填数

1,3,5,4,9,5,13,6 奇数项 1 +4=5 +4=9 +4=13 偶数项 3 4 5 6.所以1,3,5,4,9,5,13,6,(17),(7),(21),(8)