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

Terms

a(0) =1a(1) =-3a(2) =4a(3) =-7a(4) =11a(5) =-18a(6) =29a(7) =-47a(8) =76a(9) =-123a(10) =199a(11) =-322a(12) =521a(13) =-843a(14) =1364a(15) =-2207a(16) =3571a(17) =-5778a(18) =9349a(19) =-15127a(20) =24476a(21) =-39603a(22) =64079a(23) =-103682a(24) =167761a(25) =-271443a(26) =439204a(27) =-710647a(28) =1149851a(29) =-1860498