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

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =10a(5) =21a(6) =45a(7) =95a(8) =201a(9) =426a(10) =902a(11) =1910a(12) =4045a(13) =8566a(14) =18140a(15) =38415a(16) =81351a(17) =172276a(18) =364827a(19) =772590a(20) =1636105a(21) =3464761a(22) =7337285a(23) =15538085a(24) =32904826a(25) =69682176a(26) =147565152a(27) =312497045a(28) =661771440a(29) =1401425856