a(n) = Sum_{k=0..n} k^4 * (n-k)! * binomial(n,k)^2.
A341196
a(n) = Sum_{k=0..n} k^4 * (n-k)! * binomial(n,k)^2.
Terms
- a(0) =0a(1) =1a(2) =20a(3) =243a(4) =2800a(5) =33425a(6) =424116a(7) =5762155a(8) =83891648a(9) =1306561185a(10) =21709011700a(11) =383654149571
External references
- oeis: A341196