There is a column of numbers 1, 1, 5, 13, 25, 41, ..., arranged according to this rule, what is the 101st number
有一列数为1、1、5、13、25、41、…，按此规律排列，第101个数为多少
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<gadget id="calculator">4 * 99</gadget>
<output>396</output>

<gadget id="calculator">4 + 396</gadget>
<output>400</output>

<gadget id="calculator">99 / 2</gadget>
<output>99/2 = around 49.5</output>

<gadget id="calculator">400 * (99/2)</gadget>
<output>19_800</output>

<gadget id="calculator">1 + 19_800</gadget>
<output>19_801</output>

<result>19_801</result>