Expansion of e.g.f.: exp(x)*sqrt(1-2x).

Terms

a(0) =1a(1) =0a(2) =-2a(3) =-8a(4) =-36a(5) =-224a(6) =-1880a(7) =-19872a(8) =-251888a(9) =-3712256a(10) =-62286624a(11) =-1171487360a(12) =-24402416192a(13) =-557542291968