Expansion of e.g.f. (1 + x)^x.

Terms

a(0) =1a(1) =0a(2) =2a(3) =-3a(4) =20a(5) =-90a(6) =594a(7) =-4200a(8) =34544a(9) =-316008a(10) =3207240a(11) =-35699400a(12) =432690312a(13) =-5672581200a(14) =79991160144