a(n) = Sum_{k=1..n} (-1)^(n-k) * k! * k^(n-3) * Stirling2(n,k).
A373872
a(n) = Sum_{k=1..n} (-1)^(n-k) * k! * k^(n-3) * Stirling2(n,k).
Terms
- a(0) =0a(1) =1a(2) =0a(3) =1a(4) =15a(5) =391a(6) =16275a(7) =999391a(8) =85314915a(9) =9682617631
External references
- oeis: A373872