Expansion of x*(1 + 3*x + x^2)/((1 - x)^5*(1 + x)^4).

Terms

a(0) =0a(1) =1a(2) =4a(3) =9a(4) =21a(5) =35a(6) =65a(7) =95a(8) =155a(9) =210a(10) =315a(11) =406a(12) =574a(13) =714a(14) =966a(15) =1170a(16) =1530a(17) =1815a(18) =2310a(19) =2695a(20) =3355a(21) =3861a(22) =4719a(23) =5369a(24) =6461a(25) =7280a(26) =8645a(27) =9660a(28) =11340a(29) =12580