Expansion of (4-6*x-6*x^2+x^3)/((1+x)*(1-3*x+x^3)).

Terms

a(0) =4a(1) =2a(2) =10a(3) =23a(4) =70a(5) =197a(6) =571a(7) =1640a(8) =4726a(9) =13604a(10) =39175a(11) =112796a(12) =324787a(13) =935183a(14) =2692756a(15) =7753478a(16) =22325254a(17) =64283003a(18) =185095534a(19) =532961345a(20) =1534601035a(21) =4418707568a(22) =12723161362a(23) =36634883048a(24) =105485941579a(25) =303734663372a(26) =874569107071