Expansion of (1-x)/(1-2x+6x^2).

Terms

a(0) =1a(1) =1a(2) =-4a(3) =-14a(4) =-4a(5) =76a(6) =176a(7) =-104a(8) =-1264a(9) =-1904a(10) =3776a(11) =18976a(12) =15296a(13) =-83264a(14) =-258304a(15) =-17024a(16) =1515776a(17) =3133696a(18) =-2827264a(19) =-24456704a(20) =-31949824a(21) =82840576a(22) =357380096a(23) =217716736a(24) =-1708847104a(25) =-4723994624a(26) =805093376