O.g.f.: Sum_{n>=0} n! * n^n * x^n / Product_{k=1..n} (1 - n^2*k*x).
A229259
O.g.f.: Sum_{n>=0} n! * n^n * x^n / Product_{k=1..n} (1 - n^2*k*x).
Terms
- a(0) =1a(1) =1a(2) =9a(3) =259a(4) =15789a(5) =1693771a(6) =287145789a(7) =71487432619
External references
- oeis: A229259