a(n) = Sum_{k=0..n} Stirling2(n,k) * k! * n^(n - k).
A331690
a(n) = Sum_{k=0..n} Stirling2(n,k) * k! * n^(n - k).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =33a(4) =456a(5) =9445a(6) =272448a(7) =10386817a(8) =503758720a(9) =30202999821
External references
- oeis: A331690