Fill in the appropriate numbers in the brackets according to certain rules: 1, 2, 5, 10, 17, how much, 37, 50.
按一定的规律在括号中填上适当的数：1，2，5，10，17，多少，37，50．
<gadget id="calculator">17 + 9</gadget>
<output>26</output>

<result>26</result>