A series of numbers are arranged according to the following rules: 1, 5, 14, 30, 55... what is the 10th number.
一串数按下面的规律排列：1，5，14，30，55…中第10个数是多少．
<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 + 1</gadget>
<output>21</output>

<gadget id="calculator">10 * 11 * 21</gadget>
<output>2_310</output>

<gadget id="calculator">2_310 / 6</gadget>
<output>385</output>

<result>385</result>