Expansion of sqrt(1-4x)/(1-x).

Terms

a(0) =1a(1) =-1a(2) =-3a(3) =-7a(4) =-17a(5) =-45a(6) =-129a(7) =-393a(8) =-1251a(9) =-4111a(10) =-13835a(11) =-47427a(12) =-164999a(13) =-581023a(14) =-2066823a(15) =-7415703a(16) =-26805393a(17) =-97520733a(18) =-356810313a(19) =-1312087713a(20) =-4846614093a(21) =-17974854933a(22) =-66907388973a(23) =-249872516253a(24) =-935991743553