E.g.f.: exp(-1/2! * x^2 * exp(x)).

Terms

a(0) =1a(1) =0a(2) =-1a(3) =-3a(4) =-3a(5) =20a(6) =150a(7) =504a(8) =-343a(9) =-18180a(10) =-140220a(11) =-500500a(12) =2032899a(13) =50210082a(14) =441768236a(15) =1740141480a(16) =-13025325615a(17) =-330558552376