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

Terms

a(0) =1a(1) =2a(2) =7a(3) =28a(4) =117a(5) =494a(6) =2091a(7) =8856a(8) =37513a(9) =158906a(10) =673135a(11) =2851444a(12) =12078909a(13) =51167078a(14) =216747219a(15) =918155952a(16) =3889371025a(17) =16475640050a(18) =69791931223a(19) =295643364940