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

Terms

a(0) =1a(1) =1a(2) =3a(3) =10a(4) =29a(5) =88a(6) =268a(7) =813a(8) =2469a(9) =7499a(10) =22774a(11) =69165a(12) =210056a(13) =637944a(14) =1937449a(15) =5884073a(16) =17870051a(17) =54271714a(18) =164824317a(19) =500574856a(20) =1520256180a(21) =4617049429a(22) =14022074509a(23) =42585329995a(24) =129332527054a(25) =392785556813