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

Terms

a(0) =1a(1) =0a(2) =2a(3) =6a(4) =36a(5) =250a(6) =2100a(7) =20594a(8) =231168a(9) =2923722a(10) =41149140a(11) =637972522a(12) =10804678632a(13) =198480649250