The sequence (1/3), (1/2), (5/9), (7/12), (3/5), (11/18)...is arranged according to a certain law, the 2015th in the sequence What is the score.
数列(1/3)，(1/2)，(5/9)，(7/12)，(3/5)，(11/18)…是按某种规律排列的，数列中第2015个分数是多少．
<gadget id="calculator">2_015 - 1</gadget>
<output>2_014</output>

<gadget id="calculator">2_014 * 2</gadget>
<output>4_028</output>

<gadget id="calculator">1 + 4_028</gadget>
<output>4_029</output>

<gadget id="calculator">2_014 * 3</gadget>
<output>6_042</output>

<gadget id="calculator">3 + 6_042</gadget>
<output>6_045</output>

<gadget id="calculator">4_029 / 6_045</gadget>
<output>1_343/2_015 = around 0.666501</output>

<result>1_343/2_015 = around 0.666501</result>