a(n) = n! * Sum_{d|n} 1/((d-1)! * (n/d)!^(d-1)).
A370603
a(n) = n! * Sum_{d|n} 1/((d-1)! * (n/d)!^(d-1)).
Terms
- a(0) =1a(1) =4a(2) =9a(3) =40a(4) =125a(5) =936a(6) =5047a(7) =42848a(8) =367929a(9) =3668500a(10) =39916811a(11) =480577032a(12) =6227020813a(13) =87197480384
External references
- oeis: A370603