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

Terms

a(0) =0a(1) =1a(2) =-3a(3) =6a(4) =-8a(5) =3a(6) =21a(7) =-80a(8) =180a(9) =-279a(10) =217a(11) =366a(12) =-2028a(13) =5203a(14) =-9159a(15) =9840a(16) =3160a(17) =-48159a(18) =144837a(19) =-286874a(20) =377952a(21) =-128397a(22) =-1035539a(23) =3869760a(24) =-8631060a(25) =13248361a(26) =-9982143a(27) =-18429714a(28) =98483932a(29) =-250144797