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

Terms

a(0) =1a(1) =0a(2) =0a(3) =-1a(4) =-1a(5) =-1a(6) =9a(7) =34a(8) =90a(9) =-71a(10) =-1645a(11) =-9439a(12) =-25367a(13) =45902a(14) =1070146a(15) =7122361a(16) =24063637a(17) =-54352333a(18) =-1501032375a(19) =-12319959348a(20) =-53177369044a(21) =80189626539