Expansion of e.g.f. exp(x - 5*x^2/2).

Terms

a(0) =1a(1) =1a(2) =-4a(3) =-14a(4) =46a(5) =326a(6) =-824a(7) =-10604a(8) =18236a(9) =442396a(10) =-378224a(11) =-22498024a(12) =-1695704a(13) =1348185736a(14) =1458406496a(15) =-92914595024a(16) =-202295082224