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

Terms

a(0) =1a(1) =0a(2) =0a(3) =6a(4) =-12a(5) =40a(6) =180a(7) =-1512a(8) =11760a(9) =-38880a(10) =20160a(11) =2106720a(12) =-22381920a(13) =173197440a(14) =-703999296a(15) =-1737489600a(16) =86030380800