Are 1, - 2,3, - 4,5, - 6,7, - 8.2006 the number in this column? If so, which number?

Are 1, - 2,3, - 4,5, - 6,7, - 8.2006 the number in this column? If so, which number?

no
From 1, - 2,3, - 4,5, - 6,7, - 8, we can see that the number on odd digit is positive, while the number on even digit is negative, while 2006 is positive, so it is not the number in this column