a(n) = (n-1)! * Sum_{k=1..n} floor(k^k/k!).
A054202
a(n) = (n-1)! * Sum_{k=1..n} floor(k^k/k!).
Terms
- a(0) =1a(1) =3a(2) =14a(3) =102a(4) =1032a(5) =12840a(6) =194400a(7) =3457440a(8) =70680960a(9) =1635863040a(10) =42293664000
External references
- oeis: A054202