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

Terms

a(0) =1a(1) =0a(2) =2a(3) =4a(4) =8a(5) =20a(6) =44a(7) =100a(8) =228a(9) =516a(10) =1172a(11) =2660a(12) =6036a(13) =13700a(14) =31092a(15) =70564a(16) =160148a(17) =363460a(18) =824884a(19) =1872100a(20) =4248788a(21) =9642756a(22) =21884532a(23) =49667620a(24) =112722196a(25) =255826500a(26) =580606132a(27) =1317703524a(28) =2990568788a(29) =6787188100