G.f. A(x) satisfies: Sum_{n>=0} Product_{k=1..n} x^(n+1-k) - A(x)^k = 1.

Terms

a(0) =1a(1) =-1a(2) =3a(3) =-7a(4) =19a(5) =-56a(6) =177a(7) =-580a(8) =1958a(9) =-6775a(10) =23895a(11) =-85556a(12) =310120a(13) =-1135660a(14) =4194795a(15) =-15609180a(16) =58456432a(17) =-220153594a(18) =833259832a(19) =-3167840154a(20) =12091433140a(21) =-46318726124a(22) =178014658219a(23) =-686199547440