Expansion of x(1-3x+x^2+x^3)/(1+x)^2.

Terms

a(0) =0a(1) =1a(2) =-5a(3) =10a(4) =-14a(5) =18a(6) =-22a(7) =26a(8) =-30a(9) =34a(10) =-38a(11) =42a(12) =-46a(13) =50a(14) =-54a(15) =58a(16) =-62a(17) =66a(18) =-70a(19) =74a(20) =-78a(21) =82a(22) =-86a(23) =90a(24) =-94a(25) =98a(26) =-102a(27) =106a(28) =-110a(29) =114