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

Terms

a(0) =1a(1) =8a(2) =32a(3) =96a(4) =256a(5) =640a(6) =1536a(7) =3584a(8) =8192a(9) =18432a(10) =40960a(11) =90112a(12) =196608a(13) =425984a(14) =917504a(15) =1966080a(16) =4194304a(17) =8912896a(18) =18874368a(19) =39845888a(20) =83886080a(21) =176160768a(22) =369098752a(23) =771751936a(24) =1610612736a(25) =3355443200a(26) =6979321856a(27) =14495514624a(28) =30064771072a(29) =62277025792