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

Terms

a(0) =1a(1) =-3a(2) =1a(3) =-5a(4) =-5a(5) =-23a(6) =-61a(7) =-203a(8) =-655a(9) =-2205a(10) =-7519a(11) =-26073a(12) =-91499a(13) =-324525a(14) =-1161275a(15) =-4187605a(16) =-15202085a(17) =-55513255a(18) =-203776325a(19) =-751501075a(20) =-2783025305a(21) =-10345215535a(22) =-38587318505a(23) =-144377808775a(24) =-541741418525