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

Terms

a(0) =0a(1) =0a(2) =1a(3) =10a(4) =67a(5) =376a(6) =1909a(7) =9094a(8) =41479a(9) =183412a(10) =792697a(11) =3367618a(12) =14120011a(13) =58605808a(14) =241331965a(15) =987648382a(16) =4022338063a(17) =16318934764a(18) =66007533313a(19) =266354656186