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

Terms

a(0) =0a(1) =0a(2) =1a(3) =5a(4) =19a(5) =61a(6) =180a(7) =502a(8) =1349a(9) =3529a(10) =9050a(11) =22854a(12) =57014a(13) =140832a(14) =345036a(15) =839530a(16) =2030757a(17) =4887423a(18) =11710757a(19) =27951471a(20) =66486128a(21) =157661282a(22) =372840407a(23) =879510801a(24) =2070045268a(25) =4862121660a(26) =11398688956a(27) =26676792832a(28) =62333380456a(29) =145434747140