a(n) = Sum_{j = 1..n} (-1)^(n+j) * j^(2*n+4) * binomial(2*n, n-j).
A382527
a(n) = Sum_{j = 1..n} (-1)^(n+j) * j^(2*n+4) * binomial(2*n, n-j).
Terms
- a(0) =1a(1) =252a(2) =52920a(3) =12640320a(4) =3632428800
External references
- oeis: A382527
A382527
a(n) = Sum_{j = 1..n} (-1)^(n+j) * j^(2*n+4) * binomial(2*n, n-j).