Expansion of (1 - 2*x + 5*x^2) / (1 - 3*x)^2.

Terms

a(0) =1a(1) =4a(2) =20a(3) =84a(4) =324a(5) =1188a(6) =4212a(7) =14580a(8) =49572a(9) =166212a(10) =551124a(11) =1810836a(12) =5904900a(13) =19131876a(14) =61647156a(15) =197696052a(16) =631351908a(17) =2008846980a(18) =6370914708a(19) =20145865428a(20) =63536960196a(21) =199908972324a(22) =627621192180