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

Terms

a(0) =1a(1) =2a(2) =2a(3) =2a(4) =4a(5) =6a(6) =10a(7) =20a(8) =38a(9) =74a(10) =148a(11) =294a(12) =586a(13) =1172a(14) =2342a(15) =4682a(16) =9364a(17) =18726a(18) =37450a(19) =74900a(20) =149798a(21) =299594a(22) =599188a(23) =1198374a(24) =2396746a(25) =4793492a(26) =9586982a(27) =19173962a(28) =38347924a(29) =76695846