E.g.f. log(1 + x*exp(-x)).

Terms

a(0) =0a(1) =1a(2) =-3a(3) =11a(4) =-58a(5) =409a(6) =-3606a(7) =38149a(8) =-470856a(9) =6641793a(10) =-105398650a(11) =1858413061a(12) =-36044759796a(13) =762659322385