a(n) = Sum_{k=0..n} k^k * binomial(n, k)^2.
A336955
a(n) = Sum_{k=0..n} k^k * binomial(n, k)^2.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =73a(4) =849a(5) =12651a(6) =228493a(7) =4836301a(8) =117204545a(9) =3196763983a(10) =96842596701
External references
- oeis: A336955