O.g.f.: Sum_{n>=0} n! * x^n / Product_{k=1..n} (1 - (2*k-1)*x).
A189919
O.g.f.: Sum_{n>=0} n! * x^n / Product_{k=1..n} (1 - (2*k-1)*x).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =15a(4) =105a(5) =933a(6) =10023a(7) =126195a(8) =1821165a(9) =29625513a(10) =536223723a(11) =10687190775a(12) =232544252625
External references
- oeis: A189919