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

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =7a(5) =16a(6) =30a(7) =61a(8) =137a(9) =303a(10) =644a(11) =1365a(12) =2936a(13) =6340a(14) =13625a(15) =29209a(16) =62701a(17) =134758a(18) =289547a(19) =621816a(20) =1335378a(21) =2868341a(22) =6161329a(23) =13233947a(24) =28424456a(25) =61052489a(26) =131135696a(27) =281667368a(28) =604991601a(29) =1299458257