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

Terms

a(0) =0a(1) =-1a(2) =1a(3) =-4a(4) =2a(5) =-3a(6) =2a(7) =1a(8) =-6a(9) =4a(10) =-3a(11) =-2a(12) =2a(13) =2a(14) =-1a(15) =-5a(16) =4a(17) =-3a(18) =-2a(19) =4a(20) =-2a(21) =2a(22) =2a(23) =-5a(24) =-2a(25) =2a(26) =-2a(27) =2a(28) =10a(29) =-12