Expansion of (1-25*x)^(4/5).

Terms

a(0) =1a(1) =-20a(2) =-50a(3) =-500a(4) =-6875a(5) =-110000a(6) =-1925000a(7) =-35750000a(8) =-692656250a(9) =-13853125000a(10) =-283989062500