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

Terms

a(0) =1a(1) =-3a(2) =-3a(3) =9a(4) =9a(5) =-27a(6) =-27a(7) =81a(8) =81a(9) =-243a(10) =-243a(11) =729a(12) =729a(13) =-2187a(14) =-2187a(15) =6561a(16) =6561a(17) =-19683a(18) =-19683a(19) =59049a(20) =59049a(21) =-177147a(22) =-177147a(23) =531441a(24) =531441a(25) =-1594323a(26) =-1594323a(27) =4782969a(28) =4782969a(29) =-14348907