按规律填数.1,3,2,6,4,( ),( ),12,()

问题描述:

按规律填数.1,3,2,6,4,( ),( ),12,()

1,3,2,6,4,( 9 ),(8 ),12,16,……
规律:
奇数项:1,2,4,8,16,...后一项是前一项的2倍;
偶数项:3,6,9,12,...后一项比前一项大3.