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

Terms

a(0) =1a(1) =3a(2) =7a(3) =17a(4) =41a(5) =99a(6) =239a(7) =577a(8) =1393a(9) =3363a(10) =8119a(11) =19601a(12) =47321a(13) =114243a(14) =275807a(15) =665857a(16) =1607521a(17) =3880899a(18) =9369319a(19) =22619537a(20) =54608393a(21) =131836323a(22) =318281039a(23) =768398401a(24) =1855077841a(25) =4478554083a(26) =10812186007a(27) =26102926097a(28) =63018038201a(29) =152139002499