Number of 3*n X n 0..1 arrays with row sums 4 and column sums 12.

A172567

Number of 3*n X n 0..1 arrays with row sums 4 and column sums 12.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =168168000

External references