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

Terms

a(0) =1a(1) =-2a(2) =3a(3) =-5a(4) =9a(5) =-17a(6) =33a(7) =-65a(8) =129a(9) =-257a(10) =513a(11) =-1025a(12) =2049a(13) =-4097a(14) =8193a(15) =-16385a(16) =32769a(17) =-65537a(18) =131073a(19) =-262145a(20) =524289a(21) =-1048577a(22) =2097153a(23) =-4194305a(24) =8388609a(25) =-16777217a(26) =33554433a(27) =-67108865a(28) =134217729a(29) =-268435457