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

Terms

a(0) =1a(1) =0a(2) =0a(3) =-1a(4) =2a(5) =-3a(6) =5a(7) =-9a(8) =16a(9) =-28a(10) =49a(11) =-86a(12) =151a(13) =-265a(14) =465a(15) =-816a(16) =1432a(17) =-2513a(18) =4410a(19) =-7739a(20) =13581a(21) =-23833a(22) =41824a(23) =-73396a(24) =128801a(25) =-226030a(26) =396655a(27) =-696081a(28) =1221537a(29) =-2143648