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

Terms

a(0) =1a(1) =3a(2) =12a(3) =47a(4) =183a(5) =714a(6) =2785a(7) =10863a(8) =42372a(9) =165275a(10) =644667a(11) =2514570a(12) =9808261a(13) =38257827a(14) =149227404a(15) =582072215a(16) =2270414511a(17) =8855914986a(18) =34543132921a(19) =134737972743a(20) =525555146964