There is a column of numbers 1, - 1,2, - 2,3, - 3 | Math enthusiast | Mathematical art

There is a column of numbers 1, - 1,2, - 2,3, - 3

First, 2013 / 2 = 1006
Then, by observing the numbers listed above, we can find that singular is positive and even is vice
2013 can be divided by 2, that is, 2013 is even,
The answer is - 1006

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