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

Terms

a(0) =1a(1) =5a(2) =21a(3) =83a(4) =318a(5) =1196a(6) =4445a(7) =16389a(8) =60097a(9) =219527a(10) =799734a(11) =2907800a(12) =10558041a(13) =38297573a(14) =138819053a(15) =502925211a(16) =1821362830a(17) =6594366404a(18) =23870720757a(19) =86396702117a(20) =312668994969