Expansion of 1/(1+x-x^2-2*x^3).

Terms

a(0) =1a(1) =-1a(2) =2a(3) =-1a(4) =1a(5) =2a(6) =-3a(7) =7a(8) =-6a(9) =7a(10) =1a(11) =-6a(12) =21a(13) =-25a(14) =34a(15) =-17a(16) =1a(17) =50a(18) =-83a(19) =135a(20) =-118a(21) =87a(22) =65a(23) =-214a(24) =453a(25) =-537a(26) =562a(27) =-193a(28) =-319a(29) =1250