a(n) = Sum_{k=0..n} (-1)^k * binomial(2*n, k) * (n-k)^(3*n).

A383929

a(n) = Sum_{k=0..n} (-1)^k * binomial(2*n, k) * (n-k)^(3*n).

Terms

    a(0) =1a(1) =1a(2) =60a(3) =16626a(4) =12640320a(5) =20421928750

External references