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

Terms

a(0) =1a(1) =0a(2) =-2a(3) =-6a(4) =-12a(5) =0a(6) =240a(7) =2520a(8) =21840a(9) =181440a(10) =1481760a(11) =11642400a(12) =80498880a(13) =311351040a(14) =-4739454720a(15) =-183437654400