Expansion of Product_{n>=1} (1 + (4*x)^n)^(1/2).

Terms

a(0) =1a(1) =2a(2) =6a(3) =52a(4) =134a(5) =956a(6) =4124a(7) =20008a(8) =73158a(9) =439660a(10) =1874612a(11) =8350808a(12) =37583004a(13) =169862616a(14) =779948152a(15) =3774085968a(16) =15435601222a(17) =69542934604a(18) =329825707332