Expansion of x^4*(1-7*x+17*x^2-18*x^3+11*x^4-5*x^5)/((1-x)^2*(1-3*x)^2*(1-3*x+x^2)^2).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =7a(6) =34a(7) =141a(8) =537a(9) =1942a(10) =6786a(11) =23143a(12) =77513a(13) =256021a(14) =836330a(15) =2707652a(16) =8701723a(17) =27793375a(18) =88310920a(19) =279354069a(20) =880300371a(21) =2764788010a(22) =8658249900a(23) =27045078415a(24) =84287831231a(25) =262161737197a(26) =813944768564