There is a set of numbers, the first is - (A's Square), the second is (A's fifth power / 2), the third is - (A's eighth power / 3), the third is - (A's fifth power / 2)

There is a set of numbers, the first is - (A's Square), the second is (A's fifth power / 2), the third is - (A's eighth power / 3), the third is - (A's fifth power / 2)

The nth is [(- 1) ^ n] * [a ^ (3n-1) / N]