Expansion of e.g.f.: exp(x/(1-2*x)).

Terms

a(0) =1a(1) =1a(2) =5a(3) =37a(4) =361a(5) =4361a(6) =62701a(7) =1044205a(8) =19748177a(9) =417787921a(10) =9770678101a(11) =250194150581