Expansion of g.f. x*(x^4 - 5*x^3 + 10*x^2 - 12*x + 4)/((1-x)^2*(1 - 3*x + 2*x^2 - x^3)).

Terms

a(0) =4a(1) =8a(2) =14a(3) =25a(4) =48a(5) =99a(6) =215a(7) =482a(8) =1100a(9) =2534a(10) =5865a(11) =13606a(12) =31599a(13) =73425a(14) =170656a(15) =396688a(16) =922146a(17) =2143685a(18) =4983416a(19) =11584987a(20) =26931775a(21) =62608726a(22) =145547572a(23) =338356994a(24) =786584517a(25) =1828587086a(26) =4250949167a(27) =9882257793a(28) =22973462076a(29) =53406819752