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

Terms

a(0) =0a(1) =6a(2) =10a(3) =32a(4) =78a(5) =210a(6) =544a(7) =1430a(8) =3738a(9) =9792a(10) =25630a(11) =67106a(12) =175680a(13) =459942a(14) =1204138a(15) =3152480a(16) =8253294a(17) =21607410a(18) =56568928a(19) =148099382a(20) =387729210a(21) =1015088256a(22) =2657535550a(23) =6957518402a(24) =18215019648a(25) =47687540550a(26) =124847601994a(27) =326855265440a(28) =855718194318