Expansion of exp(x*(1+x)/(1-2*x)).

Terms

a(0) =1a(1) =1a(2) =7a(3) =55a(4) =577a(5) =7441a(6) =113671a(7) =2003527a(8) =39971905a(9) =889608097a(10) =21834577351a(11) =585555975511