数列
共有13项,
,
,且
,
,满足这种条件不同的数列个数为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27168a519a0eb6862b07677ece00fe74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998ddf3bcb17f54a0057af03b7aa4ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d56c51c9a13b7c1ea46dcd7defedda8.png)
更新时间:2020-03-02 19:48:38
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