Expansion of x^3/(1 - 2*x + x^3 - 2*x^4) = x^3/( (1-2*x)*(1+x)*(1-x+x^2) ).

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =4a(6) =7a(7) =14a(8) =28a(9) =57a(10) =114a(11) =228a(12) =455a(13) =910a(14) =1820a(15) =3641a(16) =7282a(17) =14564a(18) =29127a(19) =58254a(20) =116508a(21) =233017a(22) =466034a(23) =932068a(24) =1864135a(25) =3728270a(26) =7456540a(27) =14913081a(28) =29826162a(29) =59652324