Expansion of e.g.f. exp(1 - 3*x - exp(x)).

Terms

a(0) =1a(1) =-4a(2) =15a(3) =-53a(4) =178a(5) =-575a(6) =1809a(7) =-5598a(8) =17141a(9) =-52113a(10) =157724a(11) =-475997a(12) =1433429a(13) =-4311364a(14) =12958627a(15) =-38909601a(16) =116831426a(17) =-350844883a(18) =1051414421a(19) =-3160120038a(20) =9491592177a(21) =-28218244109a(22) =86403627444a(23) =-255153772169a(24) =722619907385