Expansion of (1+2*x-x^2) / (1-x-6*x^2+2*x^3).

Terms

a(0) =1a(1) =3a(2) =8a(3) =24a(4) =66a(5) =194a(6) =542a(7) =1574a(8) =4438a(9) =12798a(10) =36278a(11) =104190a(12) =296262a(13) =848846a(14) =2418038a(15) =6918590a(16) =19729126a(17) =56404590a(18) =160942166a(19) =459911454a(20) =1312755270a(21) =3750339662a(22) =10707048374a(23) =30583575806a(24) =87325186726a(25) =249412544814a(26) =712196513558