O.g.f.: exp( Integral Sum_{n>=1} n! * n^(n-1) * x^(n-1) / Product_{k=1..n} (1 - k*x) dx ).
A243440
O.g.f.: exp( Integral Sum_{n>=1} n! * n^(n-1) * x^(n-1) / Product_{k=1..n} (1 - k*x) dx ).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =25a(4) =499a(5) =18897a(6) =1158175a(7) =104287909a(8) =12948389505
External references
- oeis: A243440