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

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =4a(5) =8a(6) =17a(7) =36a(8) =77a(9) =165a(10) =354a(11) =760a(12) =1632a(13) =3505a(14) =7528a(15) =16169a(16) =34729a(17) =74594a(18) =160220a(19) =344136a(20) =739169a(21) =1587660a(22) =3410133a(23) =7324621a(24) =15732546a(25) =33791920a(26) =72581632a(27) =155898017a(28) =334853200a(29) =719230865