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

Terms

a(0) =1a(1) =2a(2) =6a(3) =14a(4) =30a(5) =62a(6) =126a(7) =254a(8) =510a(9) =1022a(10) =2046a(11) =4094a(12) =8190a(13) =16382a(14) =32766a(15) =65534a(16) =131070a(17) =262142a(18) =524286a(19) =1048574a(20) =2097150a(21) =4194302a(22) =8388606a(23) =16777214a(24) =33554430a(25) =67108862a(26) =134217726a(27) =268435454a(28) =536870910a(29) =1073741822