Number of 2*n X n 0..2 arrays with row sums 2 and column sums 4.

A172651

Number of 2*n X n 0..2 arrays with row sums 2 and column sums 4.

Terms

    a(0) =1a(1) =19a(2) =2385a(3) =1093050a(4) =1328792850

External references