Expansion of 1/(1-4*x)^(19/2).

Terms

a(0) =1a(1) =38a(2) =798a(3) =12236a(4) =152950a(5) =1651860a(6) =15967980a(7) =141430680a(8) =1166803110a(9) =9075135300a(10) =67156001220a(11) =476197099560