公务员行测的数量关系有一题1,4,9,( ),1,0
1,4,9,（ ）,1,0.
A.2B.4C.8D.16
答案是C.解析里说1,4,9,（8）,1,0可以写成50,41,32,23,14,05,这是怎么得出来的呢?1,4,9,（8）,1,0怎么能写成50,41,32,23,14,05?请给出详细解答.谢谢!