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

Terms

a(0) =0a(1) =-2a(2) =-8a(3) =-28a(4) =-96a(5) =-328a(6) =-1120a(7) =-3824a(8) =-13056a(9) =-44576a(10) =-152192a(11) =-519616a(12) =-1774080a(13) =-6057088a(14) =-20680192a(15) =-70606592a(16) =-241065984a(17) =-823050752a(18) =-2810071040a(19) =-9594182656a(20) =-32756588544a(21) =-111837988864a(22) =-381838778368