E.g.f.: exp(Sum_{n>=1} A081362(n)*x^n/n).

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-3a(4) =15a(5) =-75a(6) =435a(7) =-3045a(8) =29505a(9) =-305865a(10) =3193785a(11) =-36542835a(12) =501892335a(13) =-7286043555a(14) =108056360475