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

Terms

a(0) =1a(1) =2a(2) =0a(3) =10a(4) =-10a(5) =38a(6) =-76a(7) =310a(8) =-960a(9) =3190a(10) =-10672a(11) =37262a(12) =-130170a(13) =459690a(14) =-1639940a(15) =5901498a(16) =-21376154a(17) =77900710a(18) =-285457200a(19) =1051118590a(20) =-3887169486a(21) =14431323506a(22) =-53766825940a(23) =200964040290a(24) =-753348868380