Expansion of (1-3*x^2) / (1-x-4*x^2+2*x^3+2*x^4).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =18a(6) =38a(7) =86a(8) =186a(9) =418a(10) =914a(11) =2042a(12) =4490a(13) =9994a(14) =22042a(15) =48954a(16) =108154a(17) =239898a(18) =530522a(19) =1175898a(20) =2601882a(21) =5764634a(22) =12759322a(23) =28262298a(24) =62566554a(25) =138567834a(26) =306790810a(27) =679404442a(28) =1504298906a(29) =3331199386