O.g.f.: Sum_{n>=0} x^n / Product_{k=1..n} (1 - n*k*x).
A229233
O.g.f.: Sum_{n>=0} x^n / Product_{k=1..n} (1 - n*k*x).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =8a(4) =48a(5) =387a(6) =4043a(7) =52425a(8) =819346a(9) =15133184a(10) =324769270a(11) =7986143453a(12) =222514878501
External references
- oeis: A229233