There is a column of numbers, the first number is 1, the second number is 1995, and from the third number onwards, each subsequent number is the difference between the first two numbers and the smaller number, then the first number in this column What is the number of 1995?
有一列数，第1个数是1，第2个数是1995，第3个数起，以后每个数都是前面两个数中大数减小数的差，那么这列数中的第1995个数是多少．
<gadget id="calculator">1_995 / 3</gadget>
<output>665</output>

<gadget id="calculator">665 - 1</gadget>
<output>664</output>

<gadget id="calculator">664 * 2</gadget>
<output>1_328</output>

<gadget id="calculator">1_994 - 1_328</gadget>
<output>666</output>

<result>666</result>