a(n) = Sum_{k=0..n} binomial(n, k) * binomial(n - 1, k - 1) * n^(n - k).
A367256
a(n) = Sum_{k=0..n} binomial(n, k) * binomial(n - 1, k - 1) * n^(n - k).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =46a(4) =593a(5) =9726a(6) =192637a(7) =4457580a(8) =117769409a(9) =3492894070a(10) =114790042901
External references
- oeis: A367256