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

Terms

a(0) =1a(1) =4a(2) =13a(3) =40a(4) =120a(5) =354a(6) =1031a(7) =2972a(8) =8495a(9) =24110a(10) =68016a(11) =190884a(12) =533293a(13) =1484020a(14) =4115185a(15) =11375764a(16) =31358376a(17) =86223942a(18) =236540915a(19) =647556620a(20) =1769374931a(21) =4826148314a(22) =13142564448a(23) =35736448200a(24) =97037995225a(25) =263156279524a(26) =712795854421