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

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =17a(5) =126a(6) =787a(7) =5048a(8) =39489a(9) =361882a(10) =3641411a(11) =39948492a(12) =478777873a(13) =6226077014a(14) =87182747667