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

Terms

a(0) =2a(1) =5a(2) =10a(3) =17a(4) =29a(5) =51a(6) =90a(7) =158a(8) =277a(9) =486a(10) =853a(11) =1497a(12) =2627a(13) =4610a(14) =8090a(15) =14197a(16) =24914a(17) =43721a(18) =76725a(19) =134643a(20) =236282a(21) =414646a(22) =727653a(23) =1276942a(24) =2240877a(25) =3932465a(26) =6900995a(27) =12110402a(28) =21252274a(29) =37295141