Expansion of x^4*(2-10*x+18*x^2-7*x^3-21*x^4+25*x^5-x^6)/((1-x)^3*(1-2*x)^6).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =2a(5) =20a(6) =120a(7) =567a(8) =2320a(9) =8596a(10) =29578a(11) =96058a(12) =297776a(13) =888460a(14) =2567534a(15) =7221974a(16) =19849284a(17) =53473464a(18) =141559090a(19) =369018290a(20) =948897336a(21) =2410350276a(22) =6055659350a(23) =15063123950a(24) =37130340492a(25) =90769197360a(26) =220209351130a(27) =530489281162