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

Terms

a(0) =1a(1) =2a(2) =5a(3) =12a(4) =27a(5) =62a(6) =141a(7) =320a(8) =727a(9) =1650a(10) =3745a(11) =8500a(12) =19291a(13) =43782a(14) =99365a(15) =225512a(16) =511807a(17) =1161562a(18) =2636201a(19) =5982940a(20) =13578467a(21) =30816750a(22) =69939565a(23) =158730000a(24) =360242631a(25) =817581762a(26) =1855527025a(27) =4211175812a(28) =9557393387a(29) =21690799062