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

Terms

a(0) =1a(1) =-2a(2) =6a(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