A certain number is formed according to the following rules: its first item is 7, and each subsequent item is the sum of the square of the preceding item plus 1. So its second item is 14, because 7**2=49, 4+9+1=14, the third item is 17, and so on, what is the 2011th item.
某数按下列规律形成：它的第一项是7，以后每一项都是前项平方的数字和再加上1．这样它的第二项就是14，因为7**2=49，4+9+1=14，第三项是17，依此类推，第2011项是多少．
<gadget id="calculator">6 + 4 + 1</gadget>
<output>11</output>

<result>11</result>