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

Terms

a(0) =1a(1) =0a(2) =-2a(3) =-2a(4) =2a(5) =6a(6) =2a(7) =-10a(8) =-14a(9) =6a(10) =34a(11) =22a(12) =-46a(13) =-90a(14) =2a(15) =182a(16) =178a(17) =-186a(18) =-542a(19) =-170a(20) =914a(21) =1254a(22) =-574a(23) =-3082a(24) =-1934a(25) =4230a(26) =8098a(27) =-362a(28) =-16558a(29) =-15834