A series of numbers arranged regularly: 2, 5, 9, 14, 20, 27, ..., what is the 1995th number in this series of numbers.
规律排列的一串数：2，5，9，14，20，27，…，这串数的第1995个是多少．
<gadget id="calculator">2 + 1_996</gadget>
<output>1_998</output>

<gadget id="calculator">1_995 / 2</gadget>
<output>1_995/2 = around 997.5</output>

<gadget id="calculator">1_998 * (1_995/2)</gadget>
<output>1_993_005</output>

<result>1_993_005</result>