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

Terms

a(0) =1a(1) =3a(2) =1a(3) =5a(4) =7a(5) =7a(6) =17a(7) =21a(8) =31a(9) =55a(10) =73a(11) =117a(12) =183a(13) =263a(14) =417a(15) =629a(16) =943a(17) =1463a(18) =2201a(19) =3349a(20) =5127a(21) =7751a(22) =11825a(23) =18005a(24) =27327a(25) =41655a(26) =63337a(27) =96309a(28) =146647a(29) =222983