A028947 Difference between P(n) and nearest integer to P(n-1)^2 / P(n-2), where P(i) =i-th prime.

0, -1, 1, -4, 2, -3, 2, 1, -6, 4, -3, -2, 2, 2, -1, -5, 4, -3, -2, 4, -2, 2, 2, -5, -2, 2, -2, 2, 10, -12, 2, -4, 8, -9, 4, 0, -2, 2, 0, -4, 8, -9, 2, -2, 10, -1, -9, -2, 2, 2, -4, 8, -4, 0, 0, -4, 4, -2, -2, 8, 4, -11, -2, 2, 10, -9, 4, -8, 2, 2, 2, -2, 0, -2, 2, 2, -4, 4