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

Terms

a(0) =0a(1) =0a(2) =1a(3) =7a(4) =33a(5) =131a(6) =473a(7) =1611a(8) =5281a(9) =16867a(10) =52905a(11) =163835a(12) =502769a(13) =1532883a(14) =4651897a(15) =14070379a(16) =42456897a(17) =127894979a(18) =384799049a(19) =1156756443a(20) =3475250065a(21) =10436235955a(22) =31330727961a(23) =94038321227a(24) =282211432673a(25) =846835624611