a(n) = (n!)^n * Sum_{k=1..n} (-1)^(k+1) / k^n.
A336250
a(n) = (n!)^n * Sum_{k=1..n} (-1)^(k+1) / k^n.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =197a(4) =313840a(5) =24191662624
External references
- oeis: A336250
A336250
a(n) = (n!)^n * Sum_{k=1..n} (-1)^(k+1) / k^n.