Expansion of (1 + 2*x)*(1 + sqrt(1+4*x))/(2*sqrt(1+4*x)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =-4a(4) =15a(5) =-56a(6) =210a(7) =-792a(8) =3003a(9) =-11440a(10) =43758a(11) =-167960a(12) =646646a(13) =-2496144a(14) =9657700a(15) =-37442160a(16) =145422675a(17) =-565722720a(18) =2203961430a(19) =-8597496600a(20) =33578000610a(21) =-131282408400a(22) =513791607420