Expansion of e.g.f. Product_{k>=1} (1 - x^k/(k - 1)!).

Terms

a(0) =1a(1) =-1a(2) =-2a(3) =3a(4) =8a(5) =75a(6) =-216a(7) =-175a(8) =-3816a(9) =-36225a(10) =189800a(11) =325149a(12) =2375460a(13) =25547951a(14) =386162126a(15) =-3290670825a(16) =-6316583056a(17) =-59290501809a(18) =-310987223208