Find the law and fill in the numbers: 3, 5, 9, 17, 33, how much.
找规律填数：3，5，9，17，33，多少．
<gadget id="calculator">33 * 2</gadget>
<output>66</output>

<gadget id="calculator">66 - 1</gadget>
<output>65</output>

<result>65</result>