Find the rules and fill in the blanks: 1, 3, 7, 13, 23, 65...
找规律填空：1、3、7、13、23多少、65…
<gadget id="calculator">23 - 13</gadget>
<output>10</output>

<gadget id="calculator">13 - 7</gadget>
<output>6</output>

<gadget id="calculator">10 + 6</gadget>
<output>16</output>

<gadget id="calculator">23 + 16</gadget>
<output>39</output>

<result>39</result>