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

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =15a(5) =41a(6) =108a(7) =281a(8) =735a(9) =1926a(10) =5043a(11) =13201a(12) =34560a(13) =90481a(14) =236883a(15) =620166a(16) =1623615a(17) =4250681a(18) =11128428a(19) =29134601a(20) =76275375a(21) =199691526a(22) =522799203a(23) =1368706081a(24) =3583319040a(25) =9381251041a(26) =24560434083a(27) =64300051206a(28) =168339719535a(29) =440719107401