a(n) = Sum_{k = 0..n} k^5 * binomial(n,k)^2 * binomial(n+k,k)^2.
A357512
a(n) = Sum_{k = 0..n} k^5 * binomial(n,k)^2 * binomial(n+k,k)^2.
Terms
- a(0) =0a(1) =4a(2) =1188a(3) =126144a(4) =10040000a(5) =682492500a(6) =41503541940
External references
- oeis: A357512