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

Terms

a(0) =1a(1) =2a(2) =8a(3) =30a(4) =110a(5) =406a(6) =1498a(7) =5526a(8) =20386a(9) =75206a(10) =277442a(11) =1023510a(12) =3775826a(13) =13929382a(14) =51386818a(15) =189570870a(16) =699345010a(17) =2579950406a(18) =9517682978a(19) =35111639766a(20) =129530186066a(21) =477849203686