Expansion of (1+x)^3/((1+x)^3+x^4).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =-1a(5) =3a(6) =-6a(7) =10a(8) =-14a(9) =15a(10) =-7a(11) =-20a(12) =80a(13) =-188a(14) =351a(15) =-549a(16) =702a(17) =-622a(18) =-42a(19) =1839a(20) =-5471a(21) =11560a(22) =-20064a(23) =29144a(24) =-33329a(25) =21059a(26) =27730a(27) =-142182a(28) =355626a(29) =-689121