a(n) = Sum_{k=0..n} binomial(2*n, k) * (n-k)^(4*n).

A383853

a(n) = Sum_{k=0..n} binomial(2*n, k) * (n-k)^(4*n).

Terms

    a(0) =1a(1) =1a(2) =260a(3) =556032a(4) =4641176128

External references